The Department of Defense, through the Defense Logistics Agency (DLA Land and Maritime), is seeking proposals for the procurement of back-up rings, specifically under the title "53--BACK-UP RING,PREFOR." This opportunity is set aside for small businesses and falls under the NAICS code 339991, which pertains to Gasket, Packing, and Sealing Device Manufacturing. The goods are critical components used in various defense applications, ensuring reliability and performance in military equipment. Interested vendors should direct their inquiries to the buyer listed in the solicitation document via email at DibbsBSM@dla.mil, and they can find further details by searching the solicitation number on the DLA's DIBBS website.