... 1/4"(6.35mm) material:low carbon steel Grade:G1000 Packing:25kg/polybag packing and ... shan dong province,we are specialzing in making carbon steel balls(AISI1010-1015,AISI1045,AISI1085 G28-G1000, ... such as auto,motorcycle,bicycle,bearings,aviation and precision instrument and medical instrument and etc.they ... years development,quality of TAIAN ZHONG RUI steel balls has approved by many countries,it ...