7.938mm 5/16" G100 Ss304 316 Stainless Steel Ball for Roll on Bottle Guangzhou Decok Steel Ball Co., Ltd. Base Info Description Pre:1.588mm 2.381mm 3.175mm 4.76mm 6.35mm Solid Stainless Steel Metal Ball Next:Hot Sales 3.969mm 5/32" G1000 AISI52100 Chrome Bearing Ball