automobile usage tubes We possess ISO14001-2004&ISO9001-2000 certifications.Product informations:1.Outside diameter:4-70mm,Thickness:0.5-12mm2.Meterial:carbon steel ,alloy steel .st35,st45.st55.20crmo,A106,35CRMO etc.3.Standrads:DIN1629.DIN1630.DIN2448.DIN2391,ASTM A179,ASTM A519,A106,ETC.4.The products used in automobiles for hydraulic ,gas fuel delivery5.with good precision. seamless tubing for ...