... , Φ12.7mm, etc. inner grooved or smooth tube.3. Aluminium foil: hydrophilic or bare4. Fin type: louver fin, flat fin, ... FinFin TypeHydrophilic Foil,Bare Foil,Golden Foil,Copper FoilHydrophilic Foil,Bare Foil,Golden FoilHydrophilic Foil,Bare Foil,Golden FoilHydrophilic Foil,Bare Foil,Golden FoilHydrophilic Foil,Bare Foil,Golden FoilFin ... . copper tube shell and tube heat exchanger for air conditioner