This is a sole-source procurement for 2 units of a heat exchanger (NSN 7R-1660-014545010-QE) from the original equipment manufacturer, DRAKE AIR INC. The government does not own the technical data needed to purchase from other sources, but interested firms may submit a Source Approval Request (SAR). Delivery is FOB origin, and the location for performance is not specified. No budget amount is provided. Interested parties must express capability within 15 days, and proposals will be considered if received within 45 days of this synopsis.