This is a sole source procurement for 26 units of a heat exchanger from Drake Air Inc, the Original Equipment Manufacturer and only known source. No drawings or data are available, and the government does not own the rights to purchase the item from other sources. Other firms must submit a Source Approval Request to be considered, but the procurement will not be delayed for approval. The government intends to use FAR Part 15 procedures, and this is not a small business set-aside. Delivery is FOB origin, and interested parties may express their capability to the contracting officer.