The Defense Logistics Agency seeks an unrestricted indefinite-quantity contract for a C-5 air conditioning/heat duct assembly (NSN 1660-00-243-5397), manufactured by Arrowhead Products Corp under P/N 12986-101A. The contract will have a 3-year base period with no option periods, an estimated annual quantity of 40 each, and production delivery of 365 days. FOB is at origin, with inspection and acceptance at origin. The solicitation will be available via DIBBS and is expected to be issued on or about October 06, 2026.