... :Round square Basic Info. Model NO.: 201, 301, 302, 304, 304L, 316, 316L, 321, 309, 310Type: Stainless Steel BarsStandard: ASTMGrade: 300 ... and sample 3. Material Grade 201, 301, 302, 303, 304, 304L, 316, 316L, 321, 309S, 309H, 310, 310S etc 4. Standard ... .1000 -0.1600 -0.250 Stainless Steel round Bars 316L 304L 201 303 310 410