(1) High Purity: Al2O3 95%; (2) Application temperature: up to 1750 ºC (3) High strength: self-supporting (4) Ultra-low density: 0.35 g/cm3 (5) Low Thermal Conductivity and Linear Thermal expansion coefficient; (6) Fiber free: harmless to people in the production and using process. (7) Great Thermal Shock Resistance: can be used for quickly heating and cooling. (8) Long lifetime: much longer than ceramic fiber board