Natural Zeolite for Water Filtration Size:0.8-1.5,1-1.8,1-2, ... , 8-16mm Good quality, Relative comp Natural Zeolite for Water Filtration:Size:0.8-1.5,1-1.8,1-2 ... filter material in industrial water supply, sewage treatment and water filtration . Physical Data: Density g/cm31.8 ~ 2.2Filtering velocity m ... ≥48%Si(Al)>95% L01-858, Natural Zeolite for Water Filtration