Stainless Steel, Copper, Aluminum manufacturer / supplier in China, offering Seamless Welded Square Stainless Steel Round Tube 06cr23ni13 SUS309s 309S 1.4833, Metal Alloy Ss Round Square Stainless Steel Detective Pipe 10cr18ni12 SUS305 305 1.4303, Seamless/Welded Pickling/Cold Drawing Steel Tube/Pipe 022cr19ni10n SUS304ln 304ln and so on.