ac condenser copper tube Dia.7mm,7.94mm,9mm,9.52mm,etc did 3. ... pipe: diameter 7mm or 7.94mm,9mm or 9.52mm , inner grooved or smooth tube5. pitch of fins can be adjusted between ... products as per customized samples or drawing.14.producing procedure: tube bending, punching fin, expanding, digressing, dryingWelding, leakage test, bending, inspection ...