1higher accuracy, 2 completely interchangeable, 3,bears high temperature 4,the higher utilization of hot metal. With special ... thinner, organization more compact, hardness more higher, appearance more aesthetic, high-gloss, no deformation. SpecificationsmodelEight ballΦ20Φ30Φ40Φ50Six ball ... of 70mm The mold for the size of 70mm With sand casting metal mold