(AISI 1010 / 1015 / Q235 / Q195 / 1045 / 1065/) G200 G500 G1000 Carbon Steel Ball for Bicycles Guangzhou Decok Steel Ball Co., Ltd. Base Info Description Pre：3.175mm 3.969mm 4.763mm 6.358mm 7.144mm 7.938mm 9mm 9.525mm Chrome Steel Ball Next：304 Mirror Surface Stainless Steel Hemispehre Diameter 200mm
