The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is seeking proposals for the procurement of 50 units of a flight-critical oxygen concentrator, identified by NSN 7R-1660-016781742-V2 and reference number 3261129-0104. This procurement is subject to strict source approval requirements, as the item must be acquired from sources specified on a source control drawing, and suitable technical data or manufacturing knowledge is not available for alternative sourcing. Interested vendors must ensure they are an approved source or submit the necessary documentation for source approval, as outlined in the NAVSUP Weapon Systems Support Source Approval Information Brochures, to be considered for the contract. For inquiries, Rachel Raucheisen can be contacted at (215) 737-7063 or via email at RACHEL.RAUCHEISEN@DLA.MIL.