... :GB,JIS,ASTM and so on 3)materials :15#,20#,25#,35#,45#.etc 4)diameter:8-500mm 1)die steel bar 2 ... )standards :GB,JIS,ASTM and so on 3)materials ... :15#,20#,25#,35#,45#.etc4)diameter:8-500mm5)best exporter TypeRound steel barStandardGB/ASTM ...