... 13XDiameter:1.6-2.5mm or 3-8mmProperties1. Molecular sieve for powder crystal, metallic luster, hardness is 3 ... / g, inside the crystal surface height polarization, for pyrethroids adsorbent, also is kind of solid acid, the ... catalytic properties, thus made different properties of molecular sieve catalyst.Use:This product used as ... our product please contact me. MOLECULAR SIEVES 13X 3A 4A 5A