Stainless Steel Welded Pipe Grade:201, 202, 301, 304, 304L, 316, 316L Outer Diameter: 6mm--219mm Thickness: 0. ... , 152.4mm, 159mm, 168mm, 203mm, 219mm2) Square PipeSize: 10X10mm, 12X12mm, 12.7X12.7mm, 15X15mm, 17X17mm, 18X18mm, 19X19mm, 20X20mm, 22X22mm, 23X23mm, 24X24mm ... , Staircase, Door, Window, Balcony, Fence, Bench, Furniture, etc. 201, 202, 301, 304, 304L, 316, 316L Stainless Steel Welded Pipe