... offer, best prices and good quality Different choices: round /rectangular /square pipes Specifications:1) Round pipes-Outside diameter (unit: mm)8,9 ... customers' request6) Polishing: 600#, 400#, 320#,240#,180# etc.7) Tolerance: a) Outside diameter: ±0.15mm, b) Thickness: ±10% of wall ... days upon the receipt of deposit. stainless steel pipes,staircase round pipes,rectangular pipes,square pipes