Molecular Sieve, 3A, 4A, 5A, 13x molecular sieve etc. Detailed Product DescriptionA molecular ... sieve can adsorb water up to 22% of its own weight.Often they consist of aluminosilicate minerals, clays, porous glasses, microporous ... water can diffuse.CHEMPACK supply five types of molecular sieves: 3A, 5A, 6A, 13X(10A), Cu-13X ...