... composition %ZrO2≥94.5Packing Density Kg/l3.6-3.8Gravity6.0±0.05Flexual Strength Mpa≥900KIC MNm-3/28Compressive Strength Mpa7500Moh's ... -9Weigth loss of ball ppm/hr4SizesØmm:0.2-3mm,5mm,10mm,15mm,20mmUsage:Ø0.5-3mm Grinding ball use in sand ...