The U.S. Coast Guard is seeking quotations for two specific lube oil and jacket water coolers for WMEC 270-class main diesel engines, manufactured by Quintel Inc. The required items include a lube oil cooler (NSN 2930-01-362-4819, quantity 2) and a jacket water heat exchanger (NSN 4420-01-397-2075, quantity 2), with no substitute parts accepted. Performance of services is not specified, but items must be shipped to the USCG SFLC Baltimore Receiving Room in Baltimore, MD 21226. The government intends to award a firm-fixed-price contract on a sole-source basis to Quintel Inc. or its authorized distributors, though all responsible sources may submit quotes. No budget amount is specified, and interested parties must submit capability information within two calendar days of the notice posting.