1)round steel bar 2)standards :GB,JIS,DIN,ASTM and so ... :15Mn,16Mn,50Mn,65Mn,etc . 4)diameter :4mm-400mm 1)round steel bar 2)standards :GB,JIS,DIN,ASTM and so ... ISO9001.2001strictlyOur products conform to all the standardsWe can offer special specifications productsWe can offer original mill test certificate and original production ...