... ,10,13,19,25,38,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media is equal Denstone 99 Support ... a maximum 0.2wt% SiO2 . Because of its high alumina content and low silica (SiO2 ), it's a very excellent ... catalyst bed.The XINGFENG 99% High Alumina Support Media has very excellent thermal properties, with its high density high-temperature resistance 1550°C , also ...