310s stainless steel tube seamless weled OD:6mm-750mm T:0.3-75mm Finish: POLISH,ACID,HL,200# polish 310s stainless steel tubepipeStainless steel is a production ... treatmentPolishing or notThe stainless steel barstandardASTM,GBmaterial201,202,301,304,316,316L,316LN,317,317L,309,309S,310,310S,430,409specificationRoundSquarerectangle 310s stainless steel tube