We also can oil and paint the steel pipe. We can do special orders as your request. We also can provide all kinds of pipe 1) Sizes: a) round size:9.5mm, 12.7mm, 15.9mm, 17mm, 18mm, 19.1mm, 20mm, 21mm, 22.2mm, 23mm, 25.4mm, 28mm, 31.8mm, 35mm, 38.1mm, 38.1mm, 48mm, 50.8mm, 60mm, 63mm, 63.5mm, 73mm, 76.2mm, 88.9mm, 101.6mm, 114mm, 127mm, 133mm, 141.3mm, 159mm, 168mm, 219mm b)rectangular size:20 x ...