4A Molecular Sieve is suitable for the drying of gases (e. g: natural gas, petrol gas) and liquids, with an aperture of about 4 angstroms. Molecular Formula :  Na2O · Al2O3 · 2.0SiO2 · 4.5H2OApplication : Deep dryness of air, natural gas, alkane, refrigerant and liquids Static, dryness of electronic elements, pharmaceutical and unstable materials, Dehydration of paints and coating,  Automobile,Storage : Avoid damping and any adsorption of water or organic substance before use. Otherwise it must be regenerated.