This is a market research notice for the supply of two specific valve assembly items (NSNs 4810-01-360-1924LE and 4810-01-380-1316LE) with estimated quantities of 2 and 4 units, respectively. The required delivery schedule is 14 months after receipt of order, and the place of performance is a USAF destination. No budget amount is specified, and the contract period is to be determined. The government does not intend to set this requirement aside for small businesses, citing that the parts are available from only a limited number of sources and that it lacks the data to purchase from others. Interested parties should contact the contracting office at Hill AFB, UT, and may submit capability statements for consideration.