304 Stainless Steel Round Bar 1.Standard:AISI,ASTM,GB,JIS 2.Grade:200,300, ... 400 series 3.Diameter:6-360mm Stainless Steel Round Bar 1) Grade : 321, 304, 304L, 316, 316L, 317, 317,310S ... our best attention all the time.type stainless steel round bar size3 mm to 240mmgrade321, 304, 304L, 316, 316L, 317, 317L ... etccertificateISO,SGS,and third part inspection. 304 Stainless Steel Round Bar