1)stainless steel pipe(welded) usded for door,window,guard,rainling etc. 2)Hight polished in both side and accurated size From the nature, To the excellenceName stainless steel tubeItemsSquare pipes, round pipes, oval pipes, special shaped pipes, empaistic pipes, fittingsStandardASTM A554, A249, A269 and A270Material Grade201: Ni 0.8%~1%202: Ni 3.5%~4.5%304: Ni 8%, Cr 18%316: Ni 10%, Cr 18%316L: ...