This is a Sources Sought notice for market research to identify potential manufacturers of a specific air filter element (NSN 4130-00-595-0135). The item must be manufactured in accordance with the listed military specification and reference drawings. The notice states this is not a solicitation and the government is not obligated to pay for any information received. Interested sources should review the technical data package via the provided cfolders link and submit a completed market survey to the named Contracting Specialist.