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Net sales
 3 Months Ended
Mar. 28, 2021
Revenue from Contract with Customer [Abstract]  
Net sales Net sales
Disaggregated sales disclosures for the quarter ended March 28, 2021, and March 29, 2020, are included below and in Note 14, Segmental Information.
First Quarter
20212020
In millionsGas CylindersElektronTotalGas CylindersElektronTotal
General industrial$5.8 $21.7 $27.5 $6.2 $27.7 $33.9 
Transportation14.9 11.8 26.7 12.9 11.2 24.1 
Defense, First Response & Healthcare15.5 15.5 31.0 18.1 12.3 30.4 
$36.2 $49.0 $85.2 $37.2 $51.2 $88.4 
The Company’s performance obligations are satisfied at a point in time. With the reclassification of our Superform business as discontinued operations, none of the Company's revenue is satisfied over time. As a result, the Company's contract receivables, contract assets and contract liabilities are included within current assets and liabilities held-for-sale.