... 1.20 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 ... , This makes them all ideal choice for support of all types of catalyst. Chemical composition Al2O3+SiO2Al2O3Fe2O3MgOK2O+Na2O +CaOOther> 93%17-19%<1%<0.5 ...