... 3.0mm 3.Grade:304,304L,306,306L 4.type:welded welded stainless steel pipes,welded steel pipes,stainless steel pipes welded1.Sizes:16mm,18mm,19mm,22mm,25mm,28mm,32mm, ... blank,black, bright and galvanized3.Longth of each pipe:6m or request4.Material of stainless steel:304,314L,316,316Lnamewelded stainless steel pipesgrade304,304L,316 ... ,transporting generally lower press,fluid,such as hot water,and steam