fin evaporator coil copper tube: 7mm,7.94mm,9mm,9.52mm,10mm,etc fin:louver,flat,corrugated fin did 3.0MPa nitrogen test fin evaporator coil Suitable for ... as per customized samples or drawing.13.producing procedure: tube bending, punching fin, expanding, digressing, dryingWelding, leakage test, bending, inspection, packingNote: for ...