... Exchanger Tubes: copper, copper-nickel, steel, and stainless steel Casing: aluminum, steel, galvanized steel, etc. Finned Heat ExchangerGeneral Description: ... core tubes with drawn or pressed on fins, casing and several collectors or headers 2. Depending on ... steel Fins aluminum, copper, stainless steel, and steel Casing aluminum, steel, galvanized steel, and stainlessCustomer's satisfaction is ...