... ,ASTM and so on 3)materials :15#,20#,25#,35#,45#.etc 4)diameter:8-500mm 1)die steel bar 2 ... ,ASTM and so on 3)materials :15#,20#,25#,35#,45#.etc4)diameter:8-500mm5)best exporter TypeRound steel barStandardGB/ASTM ... /DIN/JIS and so onGrade15#,20#,25#,35#,45#.etcDiameter8mm-500mm and moreLength6m-12m or fixed as standardApplicationConstruction industry ...