... vessel etc transportation devicesHEAT EXCHANGER PHOTOS:1. material :copper , aluminum ,galvanized plate2. aluminum foil: hydrophilic ... fin or flat fin or corrugated fin4. copper pipe: diameter 7mm or 8mm or 9. ... per customized samples or drawing.14.producing procedure: tube bending, punching fin, expanding, digressing, dryingWelding, ... Quality! Hydrophilic Aluminum Fin Copper Tube Heat Exchanger For AHU