This is a total small-business set-aside procurement for manufacture and contract quality requirements of a HEAT INTERCHANGER, R, identified by CAGE 38450 reference number CSM-80-5806C007E. Drawings or technical data are not available; non-manufacturers must identify the OEM CAGE code and part number, and authorized-distributor proof may be required for award consideration. Inspection and acceptance will be at source, packaging must comply with MIL-STD-2073, marking must comply with MIL-STD-130, and inspection records must be retained for 365 calendar days after final delivery. Award will be made using lowest-price technically acceptable criteria, and any approved change in production facility requires a $250.00 price reduction to cover government administrative costs. Contractual documents are considered issued upon mailing, fax, or electronic transmission, and invoicing/receiving reports must be submitted electronically through PIEE/WAWF.