The molecular sieve range covers the four canonical synthetic zeolites used in industrial adsorption. Type 3A in the potassium exchanged form, type 4A in the sodium form, type 5A in the calcium exchanged form, and type 13X in the faujasite crystal structure. Pore openings are precise to the Ångström, set during ion exchange and confirmed by water adsorption isotherm at the QC laboratory. https://sorbitech.com/products/molecular-sieves/