1.The Ceramic Liner is compounded by rubber,flat or spherical ceramic tiles and steel backing plate through hot vulcanizing process. 2.CeramicTiles: AluminiumOxide(AL2O3)95±1% Specificgravityofceramic3.6±0.1 Hardness(Moh's)>9t 3.Special Dimendions and Shapes to order.