... Size:3-75mm Material;alumina Porous alumina Ball Product DescriptionHQ-MH Porous ceramic balls is also called filtering balls. It ... catalyst from coking or poisoning.Technical Specification Type ItemHQ-MH-1HQ-MH-2HQ-MH-3Chemical composition%Al2O320-80Al2O3+SiO2≥90Fe2O3≤1 Pore ... 20000,Deferent upon types and sizesBulk density,kg/m31200-1500SizeHQ-MH Porous ceramic balls are divided into 12 grades by ...