Stainless Steel Welded Pipe Grade:201, 202, 301, 304, 304L, 316, 316L Outer Diameter: 6mm--219mm Thickness: ... , 18mm, 19mm, 20mm, 20.2mm, 21mm, 21.3mm, 22mm, 23mm, 24.2mm, 25mm, 25.4mm, 26.8mm, 29mm, 31.8mm, 32mm ... , Railing, Staircase, Door, Window, Balcony, Fence, Bench, Furniture, etc. 201, 202, 301, 304, 304L, 316, 316L Stainless Steel Welded Pipe