99% High Alumina Ball for Ethylene Dryers 1.20 years professional manufacture 2.ISO9001:2008 3.size:3,6,10,13,19,25,38 ... ,50mm 99% High Alumina Ball for Ethylene Dryers XINGFENG 99% High Alumina Support Media ... catalyst bed.The XINGFENG 99% High Alumina Support Media has very excellent thermal properties, with its high density high-temperature resistance 1550°C , ...