finned evaporator coil copper tube:Dia.7mm,7.94mm,9mm,9.52mm,etc did 3.0MPa nitrogen test leakless certificate:ROHS,ISO finned evaporator coil Suitable for R134A, R22, R404A, R407C refrigerant and so on 1.material :copper , aluminum ,galvanized plate2.aluminum foil: hydrophilic or bare3.fin type: louver or flat fin or corrugated.4.copper pipe: diameter 7mm,7.94mm,9mm,9.52mm,etc, grooved or smooth ...