... , 20mm, 21mm, etc2)Rustless. 3)Round welded tubes, tube, pipes,Features:1) Sizes: 9.5mm, 12.7mm, 15 ... 320#, 400#, more than 400#9 Application: construction, upholstery, industrial instrument10)Rustless, good corrosion resistance, anti-wearing, good-appearance, ... excellent michanical properties. 11)Stainless steel welded tubes, tube, pipes, pipe, round, circular12)Inner packing: Plastic bag13 ...