... 13,19,25,38,50mm Inert Ceramic Ball of Size 3,6,10,13,19,25,38,50mm ... This makes them all ideal choice for support of all types of catalyst. Chemical composition Al2O3+SiO2Al2O3Fe2O3MgOK2O+Na2O + ... scale)>6.5Acid resistance (%)>99.6Alkali resistance (%)>85 Size available & Crush strength SizeCrush strengthKg/particleKN/particle1/8''( ... 50mm)>5600>56 Inert Ceramic Ball of Size 3,6,10,13,19,25,38,50mm