... .3-75mm Finish: POLISH,ACID,HL,200# polishing, 400 # polish precision tube 321 Stainless steel is a production which not easy rust ... ,309S,310,310S,430,409specificationthickness0.3mm—20mmwidth120mm—2000mmProduction technologyHot rolled ,cold rolledSurface treatment2B,BA,8K,No.1,Etching,Hairline,Satin,Mirror ...