... -70mm Application: concrete, building, ballmill. AL2O3: 95%, 92%, 75%, 68% industrial construction alumina ball : The Products, featured by high hardness, high ... (g/cm3)≥3.67Wearing loss≤0.006Ball size Normal size (mm) 1020 30405060,70Production Capacity: 1200Ton/MonthPackage: 25kg/plastic bag 1ton ...