Al2O3 : 72-74 % Water Absorption: 9.5-10.5 % Bending Resistance: 40-50 Mpa Density : 2.4-2.45 g/cm3 Thermal Shock Resistance: very good Thermal Expansion: 5.6 10-6xK-1 (20-1000 0C) Maximum Working Temperature: 1250 0C Refractoriness: 1750 0C. Wooden box, thermocal.