... Surface:bright , black , pickeled & bright 309 Round Stainless Steel Bar (stainless steel round bar, angle bar , flat bar , channel bar , hexagon bar , square bar .)1.Grade:201,202,301,302,303 ... ,304,304l,308,309,310,310S,316,316L,321,410,420,etc. applicationwidely used in the areas as ss fasteners , chains ...