Natural Zeolite for Water Filtration Size:0.8-1.5,1-1.8,1-2, 2-3, 2.5-3, 2-4, 4-8, ... -16mm Good quality, Relative comp Natural Zeolite for Water Filtration:Size:0.8-1.5,1-1.8,1-2, 2-3, 2.5-3, 2 ... as with adsorption effect, also helps remove water all sorts of micro pollutants and water leaching solution excluding toxic and harmful substances, removing ...