The Air Force is conducting market research to identify potential sources for the spares procurement of a valve, regulating, for the A-10 platform, specifically part number 28100-3 with an estimated requirement of 8 units. This is a Sources Sought notice only; no solicitation is currently available, and responses will not be treated as proposals. Interested parties, including all business types, must register as interested vendors to participate in this market research effort. Performance of the requirement would be at Tinker AFB, Oklahoma. The government may consider breaking out the requirement by airframe and will use responses to determine the acquisition strategy.