... , 12mm, 12.7mm, 13mm, 14.5mm, 15.9mm, 17.2mm, 17mm, 18mm, 19mm, 20mm, 20.2mm, 21mm, 21.3mm, 22mm, 23mm ... , Railing, Staircase, Door, Window, Balcony, Fence, Bench, Furniture, etc. Professional Manufacturer of Stairs,Handrail,Door Handle,Ornamental Stainless Steel Tube with CE ...