... 18mm, 19.1mm, 20mm, 21mm, etc2)Rustless. 3)Round welded tubes, tube, pipes,Features:1) Sizes: 9.5mm, 12.7mm, ... 1cr17mn6ni5n, 1cr13mn9ni1n)c) Customers' requests available6 Process method: automatic shape, cold drawn, nitrogen protection7 Standard: GB,ASTM-A312.A5548 ... michanical properties. 11)Stainless steel welded tubes, tube, pipes, pipe, round, circular12)Inner packing: Plastic bag13)Outer packing: ...