High-density and low wear loss alumina grinding cylinders (rod shapes), used in mine industries 1) Al2O3: 92%2) Density: 3.6g/cm³3) Compressive strength: above 2,000MPa4) Water absorption: <0.015) Crushing strength: ≥520kN6) Hardness: 9 (Mohs) 7) Size: 12mm, 20mm, 30mmPacking: 25kg/bag Alumina Grinding Cylinders (Rod Shapes)