high quality molecular sieve 1)10 years professional manufacturer for 3A, 4A,5A, 13X 2)drying,absorbent,cleaning ect. producthigh ... quality molecular sieveProduct descriptionMolecular sieve is a material ... Å): Adsorbs NH3, H2O, (not C2H6), good for drying polar liquids.4A (pore size 4 Å): Adsorbs H2O, CO2, SO2, H2S, C2H4 ...