... best prices and good quality Different choices: round /rectangular /square pipes Specifications:1) Round pipes-Outside diameter (unit: mm) ... 8,9.5,11,12,12.7,14.5,15.9,17,18,19,20,22, ... 46,88.9,102,114,133,141,159,2192) Square pipe-Outside diameter (unit: mm)10×10,12×12 ... to customers' request6) Polishing: 600#, 400#, 320#,240#,180# etc.7) Tolerance: a) Outside diameter: ±0.15mm, b) Thickness: ± ...