1)die steel bar 2)standards :GB,JIS,ASTM and so on 3) ... #,20#,25#,35#,45#.etc 4)diameter:8-500mm 1)die steel bar 2)standards :GB,JIS,ASTM and so on 3 ... #,25#,35#,45#.etc4)diameter:8-500mm5)best exporter TypeRound steel barStandardGB/ASTM/DIN/JIS and so onGrade15#,20#,25#,35 ...