... or smooth tube.3. Aluminium foil: hydrophilic or bare4. Fin type: louver fin, flat fin, corrugated fin5. Pitch of fins: can be adjusted ... Tube Smooth Tube, Inner Grooved TubeFin SurfaceLouver Fin,Corrugated FinFlat Fin,Louver Fin,Corrugated FinFlat Fin,Louver FinLouver FinLouver FinFin TypeHydrophilic Foil,Bare Foil ... delivery date. copper tube shell and tube heat exchanger for air conditioner