This is a solicitation for spare frequency converters used on F-16 aircraft, with specific delivery timelines for three line items to different destinations by June 2025, March 2026, and December 2025. The government does not own the technical data needed for manufacture, so interested firms must contact the original equipment manufacturer, Hamilton Sundstrand Corporation. The notice states the government intends to negotiate with only one or a limited number of sources, but will consider all proposals received within 45 days of the synopsis publication. Performance of services involves shipping items to specified destination codes. No budget information is provided in the description.