The pore size of 3A molecular sieve is 3A. It does not adsorb any molecular larger than 3A. According to the industrial application specialties, our products have the characters of higher adsorption speed, stronger crushing and anti-contaminative resistance, more cyclic times and longer work-span. All these advantages have made it come to be the most essential and necessary desiccant in the fields of the deep drying, refinery polymerization for cracked gasses, ethylene, propylene and any other non-acidic gasses of liquids in petroleum and chemical industrials. Typical applications: 　　 Dehydration of many kinds of liquids (such as ethanol) 　　 Dehydration of air 　　 Dehydration of refrigerant 　　 Dehydration of natural gas or methane 　　 Dehydration of cracked gas, ethylene, propylene or butadi