... , 17mm, 18mm, 19.1mm, 20mm, 21mm, 2)Rustless. 3)Round welded tubes, tube, pipes, Features:1) Sizes: 9.5mm, 12.7mm, 15 ... -appearance, excellent michanical properties.11)Stainless steel welded tubes, tube, pipes, pipe, round, circularInner packing: Plastic bagOuter packing:Carton, wooden crates, or ...