... , Φ9.52, Φ12.7mm, etc. inner grooved or smooth tube.3. Aluminium foil: hydrophilic or bare4. Fin type: louver fin, flat fin ... .5Tube MaterialCopper, Aluminium Copper, Aluminium Copper, Aluminium CopperCopperType of Tube Smooth Tube, Inner Grooved Tube Smooth Tube, Inner Grooved Tube Smooth Tube, Inner Grooved Tube Smooth Tube, Inner Grooved Tube Smooth Tube, Inner ...