... ,200# polishing, 400 # polishing 316L stainless steel tube Stainless steel is a production which not easy rust, ... company long-term supply stainless steel products, including stainless steel seamless pipes,stainless steel bar and stainless steel sheet. The material have ... stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L,309,309S,310,310S,430,409specificationRound Square ...