... 63mm, 63.5mm, 76m, 89mm,101mm, 114mm, 133mm2) Square pipe specification: 10 x 10, 12 x 12, 15 x 15, 19 x 19 ... 80 x 80mm3) Rectangular pipe specification: 15 x 10, 20 x 10, 25 x 10, 25 x 13, 30 x 15, 32x 16 ... etc.7) Tolerance: a) Outer diameter: +/-0.15mm b) Thickness: +/-10% of wall thickness c) Length: +/-4.8mm - 0mm8) Packing: ... in middle or according to customers' request Stainless steel Square tubes