The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support MECH, is seeking to procure four units of a heat exchanger (NSN 0O-1660-016836911) under a presolicitation notice. The procurement is set aside for small businesses, as indicated by the Total Small Business Set-Aside designation, and the contract will be awarded based on the capability to meet specific qualification requirements. The heat exchangers are critical components used in aircraft air conditioning, heating, and pressurizing systems, underscoring their importance in maintaining operational readiness. Interested parties should contact Sarah Haley at (717) 605-3550 or via email at SARAH.R.HALEY2.CIV@US.NAVY.MIL for further details, as the government intends to solicit and negotiate with only one source under FAR 6.302-1, with proposals due within 15 days of this notice.