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Inventories | 12 Months Ended
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Dec. 31, 2021
Inventory Disclosure [Abstract] |
Inventories | Inventories Inventories consisted of the following at December 31:
(In thousands) | 2021 |  | 2020
Raw materials: |  |  |
Fluids Systems | $ | 119,242 |  |  | $ | 98,974 |
Industrial Solutions | 4,939 |  |  | 6,315 |
Total raw materials | 124,181 |  |  | 105,289 |
Blended fluids systems components | 27,793 |  |  | 31,744 |
Finished goods — mats | 3,367 |  |  | 10,824 |
Total inventories | $ | 155,341 |  |  | $ | 147,857 |
Raw materials for the Fluids Systems segment consist primarily of barite, chemicals, and other additives that are consumed in the production of our fluids systems. Raw materials for the Industrial Solutions segment consist primarily of resins, chemicals, and other materials used to manufacture composite mats and cleaning products, as well as materials that are consumed in providing spill containment and other services to our customers. Our blended fluids systems components consist of base fluids systems that have been either mixed internally at our blending facilities or purchased from third-party vendors. These base fluids systems require raw materials to be added, as needed to meet specified customer requirements. Fluids Systems segment cost of revenues for 2020 includes $10.3 million of total charges for inventory write-downs, primarily attributable to the reduction in carrying values of certain inventory to their net realizable value.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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