... QC of external surface(Visual exam of inner pipe, appearance inspection, roughness, roundness, outside diameter ... metal, we are serious.Specification of Polished Stainless Steel Pipe Size OD: 4.0 ~ 1219mm; WT: ... pipe in stock, please feel free to contact Sheye Metal, which is one of the well-known manufacturers and suppliers ... of good polished stainless steel pipe.