Inert Ceramic Balls having stable chemical features and a low rate of water absorption, Inert Alumina ceramic balls can resist high temperatures and high pressure. Inert Alumina ceramic balls can also resist the corrosion of acid, alkali and some other organic solvents, Inert Alumina ceramic balls are able to stand the thermal shock (quick change of temperature) during the manufacturing process. The main role of these Inert Alumina ceramic balls is to increase the distribution spots of gas or liquid, and to support and protect the activating catalyst of low strength in the reactors and column/tower.