... -75mm Finish: POLISH,ACID,HL,200# polishing, 400 # polishing 316L stainless steel tube Stainless steel is a production which not easy rust,acid resistance and ... or not The stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L,309,309S,310,310S,430,409specificationRound Square rectangle