... tenacity, impact-endurable, no break under high speed Description:1. The internal structure of the bead is very fine ... . Physical parameters: CompositionZrO2>65%SiO2>30%Special Density>3.9g/cm3Bulk Density>2.4g/cm3Size0.6-20mm2. Rigidity HRA 87, 9 ... 0.6-0.8,0.8-1.0,1.0-1.2,1.2-1.4,1.4-1.7, 1.5-2.0,2.0-2 ... 3,4,5,8,10 or to be customized Application: 1) Paint , Coating 2) Ultra-fine grinding for Cosmetic , ...