... ,size:2mm-60m Bearing steel ball Production nameG28,G40,G100-G1000 high precision bearing steel balls size2MM-60MMGradeG28,G40,G80,G100 ... ,G200,G500,G1000,G2000HRC58-62hrcQuality certificateISO 9001:2008/SGS test report/ROHS report ... ,toys.Any further Information,Plz contact us! G28,G40,G100-G1000 high precision bearing steel balls