... in shan dong province,we are specialzing in making carbon steel balls(AISI1010-1015,AISI1045,AISI1085 G28-G1000,2MM-60MM),and ... steel balls(AISI304,316,420,440 G100-1000,2MM-25.4MM)they are widely used in many fields such as auto,motorcycle ... 1996.through several years development,quality of TAIAN ZHONG RUI steel balls has approved by many countries,it is growing stronger ...