... ,6,10,13,19,25,38,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media is equal Denstone ... 99 Support Media. It is in chemical composition99+% ... , also it's a good choice for heat retention or equilibration media. Chemical composition Al2O3Fe2O3MgOSiO2Na2OTiO2>99%<0.1%<0.5%<0.2 ...