... temperature, the higher utilization of hot metal. name:grinding ball mold With special alloy materials, advanced production technology and chilling process ... for more than 4,000 times, and make grinding ball crystal more thinner, organization more compact, hardness more higher ... aesthetic, high-gloss, no deformation.SpecificationsmodelEight ballΦ20Φ30Φ40Φ50Six ballΦ50Φ60Four ballΦ50Φ60Φ70Φ80Φ90Φ100Φ ...