... according to the absorbed molecule polarization,the attachment force is strong for water ,oxide,acetic acid,alkali ... The capacity is stable. It has high strength, low abrasion, no soften in water, no expansion, ... gas,ethylene and propylene, hydrogen-generation,air separation,instrument air drying and fluorine treatment for H2O2,also ... 110 93% Activated Alumina balls for air separation(2-3mm,3-5mm,4-6mm)