1.Large diameter. 2.High precision. 3.Aluminun extrusion technology. 4.wide industrial fiels, electric ,aerospace. military. SpecificationsAluminum tubes alloy:1000.2000. ... T4-T8Aluminum tube and pipesName: Aluminum pipes and Seamless aluminum tubes.Key sepcial features:Alloy :2011,2017,2024,6061,6063,7075 ... ,70750,T6,T62,T736-550(Max)>=0.410-12000 Large cross-section seam and seamless aluminum tube