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 ... type: louver or flat fin or corrugated fin.4.copper pipe: diameter 7mm,7.94mm,9mm,9.52mm, grooved or smooth ...