... for construction, industry or building material etc. Round welded tube SpecificationsFeatures: 1) Sizes: 9.5mm, 12.7mm, 15.9mm, ... 19.1mm, 20mm, 21mm, etc2)Rustless. 3)Round welded tubes, tube, pipes,Features:1) Sizes: 9.5mm, 12.7mm, 15.9mm ... michanical properties. 11)Stainless steel welded tubes, tube, pipes, pipe, round, circular12)Inner packing: Plastic bag13)Outer packing:according to customers ...