The U.S. Air Force is conducting market research to identify potential sources for the spares procurement of a DIFFERENTIAL GEAR for the F-16 platform. Performance of services would be at Tinker AFB, Oklahoma. Interested parties must be capable of new manufacture, including labor, materials, inspection, testing, and shipping. The estimated spares requirement is 32 units, with unit prices to be established at contract award. This is a sources sought notice, not a solicitation, and no funds are currently available.