NSWC IHD issued a Sources Sought Notice to identify sources capable of supplying the M48 Gas-Particulate Filter Set, NSN 4240-01-363-1311, Part Number MIL-PRF-32137A. This is market research only; it is not a Request for Proposal, no award will result, and requests for solicitation will not receive a response. Interested respondents should provide a company brochure or capabilities list, product literature, organization and contact details, business size, taxpayer identification number, UEI number, and CAGE Code. If a formal solicitation is later generated, a pre-solicitation notice will be published.