21/32′ 16.6688mm Low Carbon Steel Ball (G16) LUOYANG ZHISHENG STEEL BALL LIMITED LIABLITY COMPANY Base Info Description Pre：21/32′ 16.6688mm High Carbon Steel Ball (G10) Next：Yusion 3/16"~6" AISI 52100 Chorme Bearing Steel Ball /Chrome Steel Ball/Bearing Steel Ball
