... have been exported to the United States,Canda, Italy,India and other 16 countries for many years .Low carbon steel tubeDouble wall ... (cut to length & in coil) O.D.:4.76mm,6.00mm,6.35mm,8.00mm,9.53mm,10.00mm 12mmThickness: 0.71 ... (cut to length & in coil)O.D.:4.76mm,6.00mm,6.35mm,8.00mm,9.53mm,10.00mm 12mmThickness: 0.71 ...