This is a firm fixed-price contract for up to 21 manually operated fuel shut-off valves (Gate Valves, PN 132585) for the KC-135 aircraft. The required delivery date is for 14 units on or before July 22, 2027, to be shipped to Tinker AFB in Oklahoma. The notice indicates the government intends to solicit a limited number of sources, and while all responsible sources may submit a proposal, it is not a request for competitive proposals. The solicitation will be available electronically only, and an ombudsman is appointed for the acquisition.