The OlitAir replaceable air filter is a new reusable way to efficiently improve the air quality of your household while significantly reducing your long-term cost of use. The innovative design of the ABS plastic frame provides good support to ensure that the filter will not increase resistance and help improve trapping airborne pollutants. Each package comes with one ABS reusable frame and five pleated filter media that can be easily replaced in less than 2 seconds.