... 3mm,6mm,13mm,19mm,25mm,38mm,50mm.etc Inert Alumina Ceramic Balls are widely used in many fields, ... catalyst with low strength.Chemical Composition of inert aluminum oxide ceramic ballsChemical CompositionContent RequirementAl2O3(Marked Value +4 ... Fe2O3<1%Physical & Chemical Features of inert aluminum oxide ceramic balls FeldsparFeldspar-RhinestoneRhinestoneRhinestone corundumCorundum20-2525-4545-7070 ...