This is a solicitation for commercial items, issued as a Request for Quotation, with a firm-fixed-price purchase order anticipated on a competitive basis. The requirement is unrestricted and covers the supply of two valve check units (NSN 4820-01-312-1599) with mandatory traceability to the Original Equipment Manufacturer, Hamilton Sundstrand Corporation. Offerors must provide a Certificate of Conformance, and no drawings or specifications are available from the USCG. Only quotations with F.O.B. Destination or F.O.B. Origin shipping terms will be accepted; other Incoterms are not allowed. The applicable NAICS code is 336413 with a small business size standard of 1,250 employees.