... pipes - Outside diameter(mm) :6,8,9.5,10,11,12, 12.7,14,14.5, 15.9, 17,18,19,20,22 ... ,23,25.4,28,29, 30,31.8 ... ,42,45, 47,48,50.8,60,63,76,88.9,102,114,133,141,159,127 ... : 6m /5.8m(or according to customers' requests) 6) Polishing: 600#,400#, 320#, 240#, 180#.etc.7 ... Tolerance: a) Outer diameter: ±0.15mm b) Thickness: ±10% of wall thickness c) Length: ±4.5mm - 0mm8) ...