... ,No.1,Etching,Hairline,Satin,Mirror,Vibration,Bead Blast,Embossed The stainless steel pipestandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L ... #), Hairline,aid pickling and so onProduction technologySeamless steel pipeWelded steel pipeSurface treatmentPolishing or not The stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN ...