Alumina ceramic ball 1.Density>3.65g/cm3 2.Wear lost<0. ... Size range:20mm ~70mm 4.Manufactory type:CIP or Rolling Alumina ball have characteristics of high strength, high density, high abrasion, ... 40mm,50mm,60mm,70mm. Performance Index of Wear-resistant Alumina BallPerformance Index HXMM70 SeriesHXMM80 SeriesHXMH92 SeriesHXMH95 SeriesAl2O3(%)≥70≥80≥ ... (‰)≤0.2≤0.2≤0.15≤0.10 Alumina Ceramic Ball 95%Al2O3