... Grinding, Fine Grinding, QC of external surface(Visual exam of inner pipe, appearance inspection, roughness, roundness, outside diameter thickness). Then degreasing is ... . For metal, we are serious.Specification of Polished Stainless Steel Pipe Size OD: 4.0 ~ 1219mm; WT: 0.5 ~ 100mm; ... you are going to buy high quality polished stainless steel pipe in stock, please feel free to contact Sheye Metal, ...