... fin- flat type Sesamoid fin 1. material :copper , aluminum ,galvanized plate2. aluminum foil: hydrophilic or bare3. fin type: louver fin or ... products as per customized samples or drawing.14.producing procedure: tube bending, punching fin, expanding, digressing, dryingWelding, leakage test, ... : for further information please contact us WORKSHOP: High Efficiency! Aluminum Fin Copper Tube Evaporator