fin evaporator coil copper tube: 7mm,7.94mm,9mm,9.52mm,10mm,etc ... :louver,flat,corrugated fin did 3.0MPa nitrogen test fin evaporator coil Suitable for R134A, R22, R404A, R407C refrigerant and so on 1 ... , punching fin, expanding, digressing, dryingWelding, leakage test, bending, inspection, packingNote: for further information please contact us.