XINGFENG 4A Molecular Sieve is an alkali alumino silicate; 4A Molecular Sieve is the sodium form of the Type A crystal structure. 4A molecular sieve has an effective pore opening of about 4 angstroms ( 0.4nm) . 4A molecular sieve will adsorb most molecules with a kinetic diameter of less than 4 angstroms and exclude those larger. Such adsorbable molecules include simple gas molecules such as oxygen, nitrogen, carbon dioxyde and straight chain hydrocarbons. Branched chain hydrocarbons and aromatics are excluded. Contact person: Ms.Queenie Zhang Tel: + 86-13607999138 Email: queeniezhang@ chemxing.com MSN: queeniechang@ msn.com SKYPE: queeniezhangxt Website: www.chemxing.com