This solicitation is for the purchase of two filter cartridges (NSN 2940-14-570-4009) for U.S. Coast Guard HC-27 aircraft. It is a restricted requirement anticipated to be awarded on a sole source basis to MDH ROCKLAND INC., though all responsible sources may quote. Items must have clear traceability to OEM AIR LIQUIDE ADVANCED TECHNOLOGIES, documentation showing the offeror is an authorized distributor, and a Certificate of Conformance. No drawings, specifications, or schematics are available from the USCG. Quotations are accepted only with FOB Destination or FOB Origin shipping terms; other Incoterms are rejected.