The Department of Defense, through the Defense Logistics Agency, is seeking suppliers for heat exchangers specifically designed for aircraft air conditioning, heating, and pressurizing equipment. This presolicitation opportunity focuses on acquiring essential components that play a critical role in maintaining optimal environmental conditions within military aircraft. Interested vendors can reach out to Joe H. Lewis Jr. at DLA Aviation in Philadelphia, PA, via phone at (215) 737-9462 or email at JOSEPH.LEWIS@DLA.MIL for further details and to express their interest in this procurement.