Presolicitation notice from the Department of Defense, Department of the Navy, is seeking to procure 30 units of a valve item (NSN 1H-4820-002092019-Q3) for delivery to Portsmouth Naval Shipyard L1SS in Kittery, ME. This item is classified as a Level 1 item and will be acquired from approved sources only. The procurement requires that the inspection system of the offerors conforms to MIL-I-45208A or equivalent, as certified by a joint DCMA/NAVSUP WSS survey team. The acquisition is 100% set aside for small business concerns.