5.5mm 8mm 9.5mm 10mm 12.7mm 304 Stainless Solid Steel Ball Guangzhou Decok Steel Ball Co., Ltd. Base Info Description Pre：4.5mm 4.7mm 6.5mm ISO 3290 Bearing Steel Ball Next：1mm 3.17mm 4.76mm 8mm 9.5mm 10mm 17.4mm Stainless Steel Ball
