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    <link:label id="lab_us-gaap_IncomeStatementLocationAxis_937518D7A31CEFAD99BE10D7284ECD37_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationAxis_937518D7A31CEFAD99BE10D7284ECD37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Axis]</link:label>
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    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_761D2A20B170F83F4FF410D7284EF217_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_761D2A20B170F83F4FF410D7284EF217" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:label id="lab_us-gaap_IncomeStatementLocationDomain_761D2A20B170F83F4FF410D7284EF217_label_en-US" xlink:label="lab_us-gaap_IncomeStatementLocationDomain_761D2A20B170F83F4FF410D7284EF217" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Statement Location [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="loc_us-gaap_IncomeStatementLocationDomain_761D2A20B170F83F4FF410D7284EF217" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CostOfSalesMember_D74768D758967C48295810D7284E1F37_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfSalesMember_D74768D758967C48295810D7284E1F37" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of sales</link:label>
    <link:label id="lab_us-gaap_CostOfSalesMember_D74768D758967C48295810D7284E1F37_label_en-US" xlink:label="lab_us-gaap_CostOfSalesMember_D74768D758967C48295810D7284E1F37" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Sales [Member]</link:label>
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    <link:label id="lab_us-gaap_OperatingExpenseMember_F53BCBDCBA81B70DD64E10D7284E385D_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingExpenseMember_F53BCBDCBA81B70DD64E10D7284E385D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension settlement charges (operating expense)</link:label>
    <link:label id="lab_us-gaap_OperatingExpenseMember_F53BCBDCBA81B70DD64E10D7284E385D_label_en-US" xlink:label="lab_us-gaap_OperatingExpenseMember_F53BCBDCBA81B70DD64E10D7284E385D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Expense [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OperatingExpenseMember" xlink:label="loc_us-gaap_OperatingExpenseMember_F53BCBDCBA81B70DD64E10D7284E385D" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_2B32004E5DC05BDD5A5510D7284E701C_terseLabel_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_2B32004E5DC05BDD5A5510D7284E701C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selling, engineering, general and administrative expenses</link:label>
    <link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_2B32004E5DC05BDD5A5510D7284E701C_label_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpensesMember_2B32004E5DC05BDD5A5510D7284E701C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling, General and Administrative Expenses [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpensesMember" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpensesMember_2B32004E5DC05BDD5A5510D7284E701C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NonoperatingIncomeExpenseMember_53CF782F484ED29F1BBE10D7284E76C3_terseLabel_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpenseMember_53CF782F484ED29F1BBE10D7284E76C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Pension settlement charges (non-operating expense)</link:label>
    <link:label id="lab_us-gaap_NonoperatingIncomeExpenseMember_53CF782F484ED29F1BBE10D7284E76C3_label_en-US" xlink:label="lab_us-gaap_NonoperatingIncomeExpenseMember_53CF782F484ED29F1BBE10D7284E76C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Nonoperating Income (Expense) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NonoperatingIncomeExpenseMember" xlink:label="loc_us-gaap_NonoperatingIncomeExpenseMember_53CF782F484ED29F1BBE10D7284E76C3" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpenseMember_932C58B0F8A252EB1B3210D7284F6B29_terseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpenseMember_932C58B0F8A252EB1B3210D7284F6B29" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-operating expense</link:label>
    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpenseMember_932C58B0F8A252EB1B3210D7284F6B29_label_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpenseMember_932C58B0F8A252EB1B3210D7284F6B29" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Nonoperating Income (Expense) [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_OtherNonoperatingIncomeExpenseMember" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpenseMember_932C58B0F8A252EB1B3210D7284F6B29" xlink:type="locator" />
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    <link:label id="lab_fss_SignificantOfAccountingPoliciesLineItems_972B69203947E66C925D10D7284FE9A3_terseLabel_en-US" xlink:label="lab_fss_SignificantOfAccountingPoliciesLineItems_972B69203947E66C925D10D7284FE9A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Significant Accounting Policies [Line Items]</link:label>
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    <link:label id="lab_us-gaap_NumberOfReportableSegments_5E9F1CF6E9D340AB2BF511AFA76EDFFC_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_5E9F1CF6E9D340AB2BF511AFA76EDFFC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
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    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_58CE3F6E6844CA598EE810D7284F1DB2_terseLabel_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_58CE3F6E6844CA598EE810D7284F1DB2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cost of sales</link:label>
    <link:label id="lab_us-gaap_CostOfGoodsAndServicesSold_58CE3F6E6844CA598EE810D7284F1DB2_label_en-US" xlink:label="lab_us-gaap_CostOfGoodsAndServicesSold_58CE3F6E6844CA598EE810D7284F1DB2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cost of Goods and Services Sold</link:label>
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    <link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpense_E9AE34E4909904E7D85E10D7284F2563_terseLabel_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpense_E9AE34E4909904E7D85E10D7284F2563" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Selling, engineering, general and administrative expenses</link:label>
    <link:label id="lab_us-gaap_SellingGeneralAndAdministrativeExpense_E9AE34E4909904E7D85E10D7284F2563_label_en-US" xlink:label="lab_us-gaap_SellingGeneralAndAdministrativeExpense_E9AE34E4909904E7D85E10D7284F2563" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Selling, General and Administrative Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_E9AE34E4909904E7D85E10D7284F2563" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_F85B7336D8A0BA498D4210D72850E5F4_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_F85B7336D8A0BA498D4210D72850E5F4" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Pension settlement charges</link:label>
    <link:label id="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_F85B7336D8A0BA498D4210D72850E5F4_label_en-US" xlink:label="lab_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_F85B7336D8A0BA498D4210D72850E5F4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment</link:label>
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    <link:label id="lab_us-gaap_OtherNonoperatingIncomeExpense_98455959C7232716739D10D728505174_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_OtherNonoperatingIncomeExpense_98455959C7232716739D10D728505174" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Other expense (income), net</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_51FA41ADAB2D16CEE178EDB6FF0294C3" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_51FA41ADAB2D16CEE178EDB6FF0294C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Definite-lived intangible asset, useful life</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Asset, Useful Life</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetUsefulLife_981E4BB1E1F84DB4DC6AEDB6FF02BBA8" xlink:type="arc" />
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    <link:label id="lab_us-gaap_AmortizationOfIntangibleAssets_FD4EDFB13249B758CBE2EDB6FF027561_label_en-US" xlink:label="lab_us-gaap_AmortizationOfIntangibleAssets_FD4EDFB13249B758CBE2EDB6FF027561" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Amortization of Intangible Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_AmortizationOfIntangibleAssets" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_FD4EDFB13249B758CBE2EDB6FF027561" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated amortization of intangibles, year one</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_4B944CA7C6ABF45B0F94EDB6FF02A5B3" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated amortization of intangibles, year two</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Two</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_DF42B5E441089656E9AEEDB6FF02A7A7" xlink:type="arc" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7F8E5BBAEE40182907DDEDB6FF021298_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7F8E5BBAEE40182907DDEDB6FF021298" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Three</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7F8E5BBAEE40182907DDEDB6FF021298" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7F8E5BBAEE40182907DDEDB6FF021298" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_7F8E5BBAEE40182907DDEDB6FF021298" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated amortization of intangibles, year four</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Four</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_5F0D02DBF00F93FCEE1EEDB6FF02CD42" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated amortization of intangibles, year five</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_EB17587C60C71252E06BEDB6FF02B863" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_2A8EC13495996F0C9A38EDB6FF02E24E_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_2A8EC13495996F0C9A38EDB6FF02E24E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Estimated amortization of intangibles, thereafter</link:label>
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_2A8EC13495996F0C9A38EDB6FF02E24E_label_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_2A8EC13495996F0C9A38EDB6FF02E24E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Finite-Lived Intangible Assets, Amortization Expense, after Year Five</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_2A8EC13495996F0C9A38EDB6FF02E24E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ContractWithCustomerLiabilityAbstract_8B587DDE0D314433A4A8ED91C29C808F_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiabilityAbstract_8B587DDE0D314433A4A8ED91C29C808F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ContractWithCustomerLiabilityAbstract" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityAbstract_8B587DDE0D314433A4A8ED91C29C808F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_F026EF8B61F26BB21B67ED98874C863F_label_en-US" xlink:label="lab_us-gaap_RevenuePerformanceObligationDescriptionOfTiming_F026EF8B61F26BB21B67ED98874C863F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revenue, Performance Obligation, Description of Timing</link:label>
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    <link:label id="lab_us-gaap_ContractWithCustomerLiability_C7E8599B8B88FFB51883ED923E2713D0_label_en-US" xlink:label="lab_us-gaap_ContractWithCustomerLiability_C7E8599B8B88FFB51883ED923E2713D0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Contract with Customer, Liability</link:label>
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    <link:label id="lab_us-gaap_SaleLeasebackTransactionCurrentPeriodGainRecognized_5D083936EEB5096E31DDE7799AD3C69E_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_SaleLeasebackTransactionCurrentPeriodGainRecognized_5D083936EEB5096E31DDE7799AD3C69E" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Deferred gain</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensation_8BBE445E46D6C52D57A3E7799AD373A0_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_8BBE445E46D6C52D57A3E7799AD373A0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F384592D49A7F8EBBBFDE7799AD470A7_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F384592D49A7F8EBBBFDE7799AD470A7" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F384592D49A7F8EBBBFDE7799AD470A7_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F384592D49A7F8EBBBFDE7799AD470A7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_F384592D49A7F8EBBBFDE7799AD470A7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayable_74FE85914C8D93D57340E7799AD561CC_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayable_74FE85914C8D93D57340E7799AD561CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayable_74FE85914C8D93D57340E7799AD561CC_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayable_74FE85914C8D93D57340E7799AD561CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Payable</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_74FE85914C8D93D57340E7799AD561CC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_F5785D6307A99CA45C93E7799AD50BE5_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_F5785D6307A99CA45C93E7799AD50BE5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer deposits</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_F5785D6307A99CA45C93E7799AD50BE5_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInCustomerDeposits_F5785D6307A99CA45C93E7799AD50BE5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Customer Deposits</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInCustomerDeposits" xlink:label="loc_us-gaap_IncreaseDecreaseInCustomerDeposits_F5785D6307A99CA45C93E7799AD50BE5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_DEE30A0404A9ABCA22B2E7799AD5D62A_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_DEE30A0404A9ABCA22B2E7799AD5D62A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued liabilities</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_DEE30A0404A9ABCA22B2E7799AD5D62A_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_DEE30A0404A9ABCA22B2E7799AD5D62A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherAccruedLiabilities_DEE30A0404A9ABCA22B2E7799AD5D62A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_3E7F72040F61EA39EB50E7799AD5DAA1_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_3E7F72040F61EA39EB50E7799AD5DAA1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_3E7F72040F61EA39EB50E7799AD5DAA1_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_3E7F72040F61EA39EB50E7799AD5DAA1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Income Taxes Payable</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_789BCEE40CFDBB15ADD1E7799AD548CB_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_789BCEE40CFDBB15ADD1E7799AD548CB" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Other</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_789BCEE40CFDBB15ADD1E7799AD548CB_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_789BCEE40CFDBB15ADD1E7799AD548CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Other Operating Assets and Liabilities, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_789BCEE40CFDBB15ADD1E7799AD548CB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_CE703335E5FABC5FCFBDE7799AD55C85_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_CE703335E5FABC5FCFBDE7799AD55C85" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by continuing operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_CE703335E5FABC5FCFBDE7799AD55C85_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations_CE703335E5FABC5FCFBDE7799AD55C85" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities, Continuing Operations</link:label>
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    <link:label id="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_5134E5DD95A9FAF2249EE7799AD6826F_terseLabel_en-US" xlink:label="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_5134E5DD95A9FAF2249EE7799AD6826F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Net cash used for discontinued operating activities</link:label>
    <link:label id="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_5134E5DD95A9FAF2249EE7799AD6826F_label_en-US" xlink:label="lab_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_5134E5DD95A9FAF2249EE7799AD6826F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash Provided by (Used in) Operating Activities, Discontinued Operations</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations" xlink:label="loc_us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations_5134E5DD95A9FAF2249EE7799AD6826F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_B496C9E0EF3E57CD607EE7799AD6044C_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_B496C9E0EF3E57CD607EE7799AD6044C" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_B496C9E0EF3E57CD607EE7799AD6044C_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_B496C9E0EF3E57CD607EE7799AD6044C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_B496C9E0EF3E57CD607EE7799AD6044C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_0693B61D3BDC805E4BFDE7799AD64069_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_0693B61D3BDC805E4BFDE7799AD64069" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Investing activities:</link:label>
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    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_F335E5ACD69FB56D1CFCE7799AD6A378_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_F335E5ACD69FB56D1CFCE7799AD6A378" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of properties and equipment</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_F335E5ACD69FB56D1CFCE7799AD6A378" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromPreviousAcquisition_53E38E21338E8348200DE7799AD7AF22_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromPreviousAcquisition_53E38E21338E8348200DE7799AD7AF22" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from (payments for) acquisitions, net of cash acquired</link:label>
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    <link:label id="lab_fss_Cashcollectedfromprovidedtocustomers_C4AEC829D630707AE6C2E7799AD7F2AF_terseLabel_en-US" xlink:label="lab_fss_Cashcollectedfromprovidedtocustomers_C4AEC829D630707AE6C2E7799AD7F2AF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash collected from customer</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_832585942A9A18735645E7799AD8C138" xlink:type="locator" />
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    <link:label id="lab_fss_MassachusettsFirefighterPlaintiffsMember_340F1EAE3186BDC4A760159088C65A42_terseLabel_en-US" xlink:label="lab_fss_MassachusettsFirefighterPlaintiffsMember_340F1EAE3186BDC4A760159088C65A42" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">New Jersey Firefighter Plaintiffs</link:label>
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    <link:label id="lab_fss_BuffaloFirefighterPlaintiffsMember_0A71333F90707FEB1394159088C6F790_terseLabel_en-US" xlink:label="lab_fss_BuffaloFirefighterPlaintiffsMember_0A71333F90707FEB1394159088C6F790" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Buffalo Firefighter Plaintiffs</link:label>
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    <link:label id="lab_fss_FederalCourtEasternDistrictofPennsylvaniaMember_4E0CD449DFA388AB6A08159088C74A55_terseLabel_en-US" xlink:label="lab_fss_FederalCourtEasternDistrictofPennsylvaniaMember_4E0CD449DFA388AB6A08159088C74A55" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Federal Court, Eastern District of Pennsylvania</link:label>
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    <link:label id="lab_fss_SettlementAgreementMember_69C3F7233FF5455A1079159088C7401B_terseLabel_en-US" xlink:label="lab_fss_SettlementAgreementMember_69C3F7233FF5455A1079159088C7401B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Settlement Agreement</link:label>
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    <link:label id="lab_fss_CircuitCourtOfCookCountyMember_AEAD3E8B70FC6305F68A159088C76896_terseLabel_en-US" xlink:label="lab_fss_CircuitCourtOfCookCountyMember_AEAD3E8B70FC6305F68A159088C76896" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Circuit Court Of Cook County</link:label>
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    <link:label id="lab_fss_AlleghenyCountyPennsylvaniaMember_C27D2AC772EB71586DA7159088C7970C_terseLabel_en-US" xlink:label="lab_fss_AlleghenyCountyPennsylvaniaMember_C27D2AC772EB71586DA7159088C7970C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Allegheny County Pennsylvania</link:label>
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    <link:label id="lab_fss_SupremeCourtofStateofNewYorkErieCountyMember_6E7C3AAAA0E33A70B4A4159088C8AE03_terseLabel_en-US" xlink:label="lab_fss_SupremeCourtofStateofNewYorkErieCountyMember_6E7C3AAAA0E33A70B4A4159088C8AE03" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Supreme Court of State of New York Erie County</link:label>
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    <link:label id="lab_fss_CourtOfCommonPleasPhiladelphiaCountyMember_CE079A61342659685F9A159088C8A213_terseLabel_en-US" xlink:label="lab_fss_CourtOfCommonPleasPhiladelphiaCountyMember_CE079A61342659685F9A159088C8A213" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Court Of Common Pleas Philadelphia County</link:label>
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    <link:label id="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646_label_en-US" xlink:label="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Settlement Offer Per Eligible Plaintiff Who Has Already Filed A Lawsuit</link:label>
    <link:label id="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646_documentation_en-US" xlink:label="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Settlement offer amount to each firefighter who has already filed a lawsuit and is eligible to be part of the settlement.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit" xlink:label="loc_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646" xlink:to="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit_E1291C7D35F5E3A14C0E159088CF5646" xlink:type="arc" />
    <link:label id="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B_terseLabel_en-US" xlink:label="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Settlement offer per eligible plaintiff who has not already filed a lawsuit</link:label>
    <link:label id="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B_label_en-US" xlink:label="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Settlement Offer Per Eligible Plaintiff Who Has Not Already Filed A Lawsuit</link:label>
    <link:label id="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B_documentation_en-US" xlink:label="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Settlement offer amount to each firefighter who has not filed a case and is eligible to be part of the settlement.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit" xlink:label="loc_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:to="lab_fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit_9CA067980DA4DD451975159088CFC29B" xlink:type="arc" />
    <link:label id="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8_terseLabel_en-US" xlink:label="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of firefighters considered as part of the settlement</link:label>
    <link:label id="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8_label_en-US" xlink:label="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number Of Firefighters Considered As Part Of The Settlement</link:label>
    <link:label id="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8_documentation_en-US" xlink:label="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Number of firefighters whose claims may be considered as part of this settlement offer.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_NumberOfFirefightersConsideredAsPartOfTheSettlement" xlink:label="loc_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:to="lab_fss_NumberOfFirefightersConsideredAsPartOfTheSettlement_BEB55C9CE03C028DB939159088CF25D8" xlink:type="arc" />
    <link:label id="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86_terseLabel_en-US" xlink:label="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of cases scheduled</link:label>
    <link:label id="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86_label_en-US" xlink:label="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Number of Cases Scheduled</link:label>
    <link:label id="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86_documentation_en-US" xlink:label="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loss Contingency, Number of Cases Scheduled</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_LossContingencyNumberofCasesScheduled" xlink:label="loc_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:to="lab_fss_LossContingencyNumberofCasesScheduled_DB430D40B601D60E0FF8159088CF6F86" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of new claims filed</link:label>
    <link:label id="lab_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758_label_en-US" xlink:label="lab_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, New Claims Filed, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyNewClaimsFiledNumber" xlink:label="loc_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758" xlink:to="lab_us-gaap_LossContingencyNewClaimsFiledNumber_478BD38297B1138C3E09159088CF2758" xlink:type="arc" />
    <link:label id="lab_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168_terseLabel_en-US" xlink:label="lab_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance recoveries</link:label>
    <link:label id="lab_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168_label_en-US" xlink:label="lab_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Recoveries</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InsuranceRecoveries" xlink:label="loc_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168" xlink:to="lab_us-gaap_InsuranceRecoveries_AF59D628964D26787360159088CF6168" xlink:type="arc" />
    <link:label id="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C_terseLabel_en-US" xlink:label="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of units involved in dispute</link:label>
    <link:label id="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C_label_en-US" xlink:label="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Number of Units Sold</link:label>
    <link:label id="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C_documentation_en-US" xlink:label="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Number of Units Sold</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_PropertyPlantandEquipmentNumberofUnitsSold" xlink:label="loc_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:to="lab_fss_PropertyPlantandEquipmentNumberofUnitsSold_4AE3DCDB9AEDA773A846159088D0F60C" xlink:type="arc" />
    <link:label id="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60_terseLabel_en-US" xlink:label="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Hearing loss settlement</link:label>
    <link:label id="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60_label_en-US" xlink:label="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency Claims Settled Amount</link:label>
    <link:label id="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60_documentation_en-US" xlink:label="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loss contingency claims settled amount.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_LossContingencyClaimsSettledAmount" xlink:label="loc_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:to="lab_fss_LossContingencyClaimsSettledAmount_53D0D08A01E3B86D4D74159088D0DE60" xlink:type="arc" />
    <link:label id="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3_terseLabel_en-US" xlink:label="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of plaintiffs cases dismissed</link:label>
    <link:label id="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3_label_en-US" xlink:label="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency Number Of Plaintiffs Dismissed</link:label>
    <link:label id="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3_documentation_en-US" xlink:label="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Loss contingency number of plaintiffs, dismissed.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_LossContingencyNumberOfPlaintiffsDismissed" xlink:label="loc_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:to="lab_fss_LossContingencyNumberOfPlaintiffsDismissed_6EAE8B24CE4484835052159088D059C3" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Damages maximum amount</link:label>
    <link:label id="lab_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2_label_en-US" xlink:label="lab_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Damages Sought, Value</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyDamagesSoughtValue" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2" xlink:to="lab_us-gaap_LossContingencyDamagesSoughtValue_75EB1AD660353D6F8C1D159088D0DCF2" xlink:type="arc" />
    <link:label id="lab_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F_terseLabel_en-US" xlink:label="lab_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of claimants settled</link:label>
    <link:label id="lab_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F_label_en-US" xlink:label="lab_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Loss Contingency, Pending Claims, Number</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LossContingencyPendingClaimsNumber" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F" xlink:to="lab_us-gaap_LossContingencyPendingClaimsNumber_C109001B484913C9659F159088D0764F" xlink:type="arc" />
    <link:label id="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE_terseLabel_en-US" xlink:label="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of claimants agreed for settlement</link:label>
    <link:label id="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE_label_en-US" xlink:label="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Percentage Of Claimants Agreed For Settlement</link:label>
    <link:label id="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE_documentation_en-US" xlink:label="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of claimants agreed for settlement.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_PercentageOfClaimantsAgreedForSettlement" xlink:label="loc_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:to="lab_fss_PercentageOfClaimantsAgreedForSettlement_C2A469D676194F5E1403159088D12DDE" xlink:type="arc" />
    <link:label id="lab_fss_PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement_61F11C5A809B1194BBAE159088D14DCE_terseLabel_en-US" xlink:label="lab_fss_PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement_61F11C5A809B1194BBAE159088D14DCE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of claimants agreed for settlement as per settlement agreement</link:label>
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    <link:label id="lab_fss_Purchasepriceinclusiveofadjustmentforworkingcapitalandotherpostclosingitems_D9389EC085059D5BA154062BE98FD2C7_terseLabel_en-US" xlink:label="lab_fss_Purchasepriceinclusiveofadjustmentforworkingcapitalandotherpostclosingitems_D9389EC085059D5BA154062BE98FD2C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchase price, inclusive of adjustment for working capital and other post-closing items</link:label>
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    <link:label id="lab_fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTradeNames_4A6A5416EE59D2548B28062BE9912E75_terseLabel_en-US" xlink:label="lab_fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTradeNames_4A6A5416EE59D2548B28062BE9912E75" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade names</link:label>
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    <link:label id="lab_us-gaap_ShortTermDebtTypeAxis_68D9A2DCE9C9DADD55A610D72709BE43_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeAxis_68D9A2DCE9C9DADD55A610D72709BE43" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Axis]</link:label>
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    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_EB987C012D7B683BF3B810D727098C31_terseLabel_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_EB987C012D7B683BF3B810D727098C31" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
    <link:label id="lab_us-gaap_ShortTermDebtTypeDomain_EB987C012D7B683BF3B810D727098C31_label_en-US" xlink:label="lab_us-gaap_ShortTermDebtTypeDomain_EB987C012D7B683BF3B810D727098C31" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Short-term Debt, Type [Domain]</link:label>
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    <link:label id="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E_terseLabel_en-US" xlink:label="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non Us Lines Of Credit</link:label>
    <link:label id="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E_label_en-US" xlink:label="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Non Us Lines Of Credit [Member]</link:label>
    <link:label id="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E_documentation_en-US" xlink:label="lab_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Non-US lines of credit.</link:label>
    <link:loc xlink:href="fss-20181231.xsd#fss_NonUsLinesOfCreditMember" xlink:label="loc_fss_NonUsLinesOfCreditMember_49E802140F0FEF25005810D7270AD49E" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_7B4058C80EE1C2F56B8C10D7270B2792_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_7B4058C80EE1C2F56B8C10D7270B2792" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured credit facility</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_7B4058C80EE1C2F56B8C10D7270B2792_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_7B4058C80EE1C2F56B8C10D7270B2792" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_7B4058C80EE1C2F56B8C10D7270B2792" xlink:type="locator" />
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    <link:label id="lab_fss_LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement_656F2B302A7522416D0410D7270C241A_terseLabel_en-US" xlink:label="lab_fss_LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement_656F2B302A7522416D0410D7270C241A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Secured credit facility, available increment</link:label>
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    <link:loc xlink:href="fss-20181231.xsd#fss_LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement" xlink:label="loc_fss_LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement_656F2B302A7522416D0410D7270C241A" xlink:type="locator" />
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    <link:label id="lab_fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock_CFBBCB7C812133EB1C3510D7270C6255_terseLabel_en-US" xlink:label="lab_fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock_CFBBCB7C812133EB1C3510D7270C6255" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Guaranteed percentage of outstanding voting capital stock</link:label>
    <link:label id="lab_fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock_CFBBCB7C812133EB1C3510D7270C6255_label_en-US" xlink:label="lab_fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock_CFBBCB7C812133EB1C3510D7270C6255" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Guarantee Obligations, Maximum Exposure, Percentage of Outstanding Voting Capital Stock</link:label>
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    <link:loc xlink:href="fss-20181231.xsd#fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock" xlink:label="loc_fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock_CFBBCB7C812133EB1C3510D7270C6255" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_6EA01A08FEE5C55D455C10D7270CC6B0_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_6EA01A08FEE5C55D455C10D7270CC6B0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Base rate borrowings margin ranges</link:label>
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    <link:label id="lab_fss_CreditFacilityCovenantsPermittedDividendPayments_E3938E423F276C42ACB510D7270CEF6A_terseLabel_en-US" xlink:label="lab_fss_CreditFacilityCovenantsPermittedDividendPayments_E3938E423F276C42ACB510D7270CEF6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit facility, covenant terms, permitted dividend payouts</link:label>
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