... Φ7, Φ7.94, Φ9.52, Φ12.7mm, etc. inner grooved or smooth tube.Aluminium foil: hydrophilic or bareFin type: louver fin, flat ... Copper, Aluminium Copper, Aluminium CopperCopperType of TubeSmooth Tube, Inner Grooved TubeSmooth Tube, Inner Grooved TubeSmooth Tube, Inner Grooved TubeSmooth Tube, Inner Grooved TubeSmooth Tube, Inner Grooved TubeFin SurfaceLouver Fin,Corrugated FinFlat Fin,Louver Fin ...