The U.S. Air Force is conducting market research through a Sources Sought notice to identify potential suppliers for the new manufacture of a directional sleeve (NSN 1650-00-625-6630, P/N 6-61567-1) used on the KC-135 aircraft. This is a spares buy with an estimated quantity of 21 units (range 5–32) and no repair requirement. Interested firms must be capable of providing labor, materials, facilities, and equipment for manufacturing, inspection, testing, packaging, and shipping, and may need to complete a Source Approval Request (SAR) to become qualified. The government is seeking responses from all business types, including small, 8(a), HUBZone, SDVOSB, and women-owned businesses, under NAICS 336413 (size standard 1,250 employees). Performance would take place at Tinker AFB, Oklahoma.