99% High Alumina Ball for Ethylene Dryers 1.20 years professional manufacture 2.ISO9001:2008 ... ,10,13,19,25,38,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media is equal Denstone 99 Support ... silica (SiO2 ), it's a very excellent and ideal product for high temperature and steam applications, such as secondary reformers in ammonia ...