... activated carbon Filter iron matter, impurities and soil Tap Water Filter-2pcs in 1 packFiltration system: high density filtration core ... : Diameter: 3.8CM High: 7.1CMMaterial: High-density water tender filtration cotton, activated carbon,PP,PS,PVC colophonyFunction:High ... dirty, then it reaches to its saturation.Based on the theory of capillary absorption, activated carbon can absorb the Ozone, ...