AISI201 304 316 440c Stainless Steel Ball Hollow Sphere 50mm 200mm 300mm Guangzhou Decok Steel Ball Co., Ltd. Base Info Description Pre：G200 3.17mm 3.5mm 4mm 4.5mm 4.76mm 6.35mm 6.8mm Solid Steel Ball Next：Small Size Mirror Ball 1.588mm 1.7mm 2.381mm 316 Stainless Steel Ball
