This opportunity is for the procurement of one unit of NSN 7R-4920-016199200-SX, a flight-critical item, with delivery FOB Origin. The government lacks sufficient data to purchase this item from any source other than the currently approved supplier(s). Prospective bidders who are not already an approved source must submit detailed technical data as outlined in the NAVSUP WSS Source Approval Information Brochure with their proposal. Proposals will be considered if received within 45 days of this synopsis's publication. The location for performance of services is not specified.