... nice impact resistance that causes no break under high speed impact.C.The TZP beads have 30-50 times ... beads sizeφ0.1,φ0.2,φ0.4~φ0.6,φ0.6~φ0.8,φ0.8~φ1.0,φ1.0 ~φ1.2,φ1.2~φ1.4,φ1.4~φ1.6,φ ... 1.6~φ1.8,φ1.8~φ2.0 ... ,φ2.0 ... strength: 900Mohs Hardness: 9 Zirconium Silicate TZP Ceramic Beads(0.4)