4.5” x 20” NSF 61 certified activated aluminum water filter specifically designed for the removal of fluoride and arsenic from water.
Activated alumina (AA) is the only filter material specifically designed to remove fluoride and arsenic from water. It is a ceramic compound made of aluminum oxide with a very high surface-area-to-weight ratio, AA has a very high capacity for fluoride adsorption. Most municipal water supplies add 2 ppm (parts per million) of fluoride. AA filters can reduce fluoride concentrations to below 0.1 ppm, in other words 99% of the normal fluoridated water levels.
| Property: | Value: |
| Apparent Density, lb/ft 3 | 47-49 |
| U.S. Standard Sieve Size (Mesh Size) | 14 x 28 |
| Al2O3, % | 93 |
| Na2O, % | 0.3 |
| Fe2O3, % | 0.01 |
| TiO2, % | 0.002 |
| SiO2. % | 0.02 |
| Loss of Ignition, % | 7 |
| Total pore volume, cm 3 /g | 0.5 |
| Specific Surface Area, m 2 /g | 33 |