... tube with aluminium finR134a≤3.1Used for vehicle and vessel etc transportation devices1. material :copper , aluminum ,galvanized plate2. aluminum ... as per customized samples or drawing.14.producing procedure: tube bending, punching fin, expanding, digressing, dryingWelding, leakage ... information please contact us Radiator: Workshop: Customized! aluminum fin tube type radiator for heating and cooling