... 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 ... ±0.07mm 1.0±0.07mmCoating: copper, white zinc, yellow ... cut to length & in coil)O.D.:4.76mm,6.00mm,6.35mm,8.00mm,9.53mm,10.00mm 12mmThickness: 0. ...