... of Auto metal pipe factory Our products 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 ... , white zinc, yellow zinc, PVF,PVDF,PA11,PA12Single wall(cut to length & in coil)O.D.:4.76mm,6.00mm,6 ...