The Department of Defense, through the Defense Logistics Agency (DLA Aviation), is seeking suppliers for an indefinite quantity contract (IQC) for the procurement of the Duct, Manifold, Air B for the C-5 aircraft. This contract, which will be issued as unrestricted, requires an estimated annual quantity of 40 units, with delivery expected 450 days after receipt of order, and inspection and acceptance to occur at the origin. The Duct, Manifold, Air B is a critical airframe structural component, essential for the operational capabilities of the C-5 aircraft. Interested parties can access the solicitation via the DLA Internet Bid Board System (DIBBS) on or about December 30, 2025, and should direct inquiries to Ryan Loeffelholz at ryan.loeffelholz@dla.mil or by phone at 804-279-1452.