The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure 65 units of the aircraft inverter (NSN 7R-1680-015240941-H1) as part of a presolicitation notice. This procurement is designated as a sole source award to Avionic Instruments LLC due to the critical nature of the item, which requires government source approval prior to contract award, as suitable technical data or manufacturing knowledge is not available for alternative sources. Interested parties must submit the necessary documentation for source approval along with their proposals, and the procurement process will not consider offers that fail to meet the specified requirements. For further inquiries, interested vendors can contact Marisa L. Tetkowski at NAVSUP WSS via email at marisa.tetkowski@navy.mil or by phone at (215) 697-2644.