... G28-G1000,2MM-60MM),and chrome steel balls(AISI52100 G40-G1000,2MM-60MM) and stainless steel balls(AISI304,316,420,440 G100-1000 ... many fields such as auto,motorcycle,bicycle,bearings,aviation and precision instrument and medical instrument and etc.they are widely ... 1996.through several years development,quality of TAIAN ZHONG RUI steel balls has approved by many countries,it is growing stronger ...