Zirconium Oxide Bead Component:ZrO2 94.6%,Y2O3 5.2+/-0.2% Good round sphere,smooth surface,pearl-like sheen. Zirconium Oxide Bead Specifications:Composition:ZrO2 94.6%,Y2O3 5.2±0.2%Density:6.0g/cm3Packing density:3.7~3.9g/cm3 Hardness:HRA> 87Hardness on Moh's scale:9Characteristic:Good round sphere, smooth surface, pearl-like sheen.Good tenacity, impact-endurable, no break under high speed impact ...