The pore size for 4A molecular sieve is 4A. It is mainly used to adsorb water, methanol, ethanol, sulfureted hydrogen, carbon dioxide, ethylene, propylene, does not adsorb any larger molecular than 4A, and often used as desiccant in industrials. Formula:Na2O·Al2O3·2.0SiO2·4.5H2O Technical parameter: Item Unit Target Shape Pellet Sphere Diameter mm 1.5-1.7 3.0-3.3 1.7-2.5 3.0-5.0 Size ratio to grade % ≥98 ≥98 ≥96 ≥96 Bulk density g/ml ≥0.60 ≥0.60 ≥0.60 ≥0.60 Wear ratio % ≤0.20 ≤0.25 ≤0.20 ≤0.20 Crushing strength N ≥30 ≥45 ≥60 ≥70 H2O adsorption % ≥20.5 ≥20.5 ≥20.5 ≥20.5 Methane adsorption % ≥16 ≥16 ≥16 ≥16 Packing water % ≤1.5 ≤1.5 ≤1.5 ≤1.5 Typical applications: ● Deep drying of air, natural gas, alkane and refrigerant. ● Generation and purification of argon. ● Static dehydration of electronic element, pharmaceutical and unstable materials. ● Desiccant for paint, dope and foul etc. Packing 25 Kg Carbon box; 55 Gallon iron drum.