... :0.3-75mm Finish: POLISH,ACID,HL,200# polishing, 400 # polishing 316L stainless steel tube Stainless steel is a production which not easy rust,acid resistance ... treatment2B,BA,8K,No.1,Etching,Hairline,Satin,Mirror,Vibration,Bead Blast,Embossed The stainless steel pipestandardASTM,GBmaterial201,202,301,304,316,316L ...