... : POLISH,ACID,HL,180# 200# 320# 400 SS304 steel tubeStainless steel is a production which not easy ... seamless pipes,stainless steel bar and stainless steel sheet. The material have 201,202,301, 309 309S ... production:The details of my companyThe stainless steel sheet/coil/stripstandardASTM,GBmaterial201,202,301,304,316,316L ... ,309,309S,310,310S,430,409specificationRoundSquarerectangle SS304 steel tube