Inert ceramic balls can stand-up high atmospheric pressure and temperature, low water absorption, corrosion resistance and steady chemical property. It is widely used in petro chemical, fertilizer, coal gas, environmental-protecting etc. To support and cover the catalyst. Technical specification Al2o3 20-24 % Al2o3+sio290 % Fe2o3 11 % Water absorption 10.5 % Acid resistance98 % Alkali resistance80 % Thermal resistance1300 230 Bulk density 1350 kg/m3. One ton ceramic ball in 40 plastic bags on one fumigation wooden pallet.