Alumina ball 1.Density>3.62g/cm3 ... 5mm ~70mm 4.Manufactory type:CIP or Rolling Alumina ball have characteristics of high strength, high density, ... sanitary ceramics, kaolins, refractory materials, paints, coatings and other fields. Normal size range: Diameter 20mm,25mm ... 60mm,70mm. Performance Index of Wear-resistant Alumina BallPerformance Index HXMM70 SeriesHXMM80 SeriesHXMH92 SeriesHXMH95 SeriesAl2O3 ...