... , bears high temperature, the higher utilization of hot metal. name: The mould of oval ballWith special alloy materials, advanced production ... for more than 4,000 times, and make grinding ball crystal more thinner, organization more compact, hardness more higher ... , appearance more aesthetic, high-gloss, no deformation. oval ball specificationsφ20x35φ60x97φ25x41φ70x113φ30x49φ80x129φ40x65φ90x146φ50x81 ...