This notice covers NSN 7R-1680-016043773-KB, quantity 16 units, with delivery FOB origin. The item is flight critical and requires Government source approval prior to award; only previously approved sources have been solicited, and award will not be delayed for new source approval. New sources must submit the required technical data specified in the NAVSUP WSS Source Approval Information Brochure with any offer. The Government intends to solicit and negotiate with only one source under FAR 6.302-1, but all responsible sources may identify their interest and capability.