Factory direct offer, best prices and good quality Different choices: round /rectangular /square pipes Specifications:1) Round pipes-Outside diameter (unit: mm)8, ... ,48×48,50×50,60×60,70×70,80×803) Rectangular pipes: Outside dimensions (mm)20×10,23×11,24×12 ... ) Wall thickness: from 0.3 to 3.0mm5) Length: 6m(or according to customers' request6) Polishing: 600#, 400#, 320#,240#,180 ...