The products are featured by high hardness, big density, low wear lost, good normalizations, good corrosion-resistance etc. - Alumina Ball Size:30mm,40mm,50mm,60mm Bulk density: 3.62g/cm3 Wearing loss: 0.1%Alumina Ball, grinding ball, Ceramic ball, al203 ball: The Products, featured by high hardness, high density, low wear loss. Good normalization, good corrosion-resistance, etc., are the most ...