... Ceramic Ball 1.20 years professioanl manufacture 2.ISO9001:2008 3.Size:3,6,10,13,19,25,38, ... Ceramic Ball of Size 3,6,10,13,19,25,38,50mm XINGFENG Catalyst bed support media 17 ... Na2O +CaOOther> 93%17-19%<1%<0.5%<4%<1%Leach able Fe2O3 is less than 0.1% Chemical composition ItemValueWater absorption ... (%)<0.5Bulk density (g/cm3)1.35-1.4Specific gravity (g/cm3) 2.3-2.4 ...