high quality molecular sieve 1)10 years professional manufacturer for 3A, 4A,5A, 13X 2)drying,absorbent,cleaning ect. producthigh quality molecular sieveProduct ... . Good for drying nonpolar liquids and gases.5A (pore size 5 Å): Adsorbs normal (linear) hydrocarbons to nC4H10, alcohols to C4H9OH, ... and the liquid hydrocarbon Package can meet individrual requirements high quality molecular sieve