38.1mm 1 1/2" G28 AISI 52100 Chrome Steel Ball LUOYANG ZHISHENG STEEL BALL LIMITED LIABLITY COMPANY Base Info Description Pre：34.925mm 1 3/8" G28 AISI 52100 Chrome Steel Ball Next：42.8625mm 1 11/16" G40 AISI 52100 Chrome Steel Ball
