... years professioanl manufacture 2.ISO9001:2008 3.Size:3,6,10,13,19,25,38,50mm Inert Ceramic ... Ball of Size 3,6,10,13,19,25,38,50mm XINGFENG Catalyst ... +SiO2Al2O3Fe2O3MgOK2O+Na2O +CaOOther> 93%17-19%<1%<0.5%<4%<1%Leach able Fe2O3 is less than 0 ... volume (%)40Operation temp.(max) (°C)1100Moh’s hardness (scale)>6.5Acid resistance (%)>99.6Alkali resistance (%)>85 Size available & ...