... -25.4mmGrade 100-1000 Name good quality bicycle carbon steel ball (ISO standard) Size0.5-25.4mmGradeG100/G200/G500/G1000HRC60 ... surface, best quality and high hardnessApplicationMainly used for precision bearing, ball screws,precision machinery, automobiles, bicycles and wheels, trundles Package1) ... of shipmentQingdao/Tianjin/ShanghaiOutput per yearMore than 4000 tons 2.5mm bicycle carbon steel ball