Molecular Sieve 5A is an alkali alumino silicate; it is the calcium form of the Type A crystal structure. Type 5A has an effective pore opening of 5 angstroms ( 0.5 nm) . It will adsorb molecules with a kinetic diameter of less than 5 Angstrom and exclude those larger. It is especially suitable for PSA adsorber applications where it may be used for the separation of normal- and iso- paraffins ( C4 to C6 species) , in PSA hydrogen purification and in oxygen concentrators. Contact person: Ms.Queenie Zhang Tel: + 86-13607999138 Email: queeniezhang@ chemxing.com MSN: queeniechang@ msn.com SKYPE: queeniezhangxt Website: www.chemxing.com