GREAT VALUE This is a replacement particle HEPA air purifier filter that helps effectively filter airborne particles such as smoke pollen dust pet dander and fabric fibers.|COMPATIBILITY Compatible with all Aerus Electrolux Guardian Series Air Purifiers. Please note that this is a replacement product not an OEM product. We are not affiliated with Aerus Electrolux Corporation.|MOST EFFICENT “High-Efficiency Particulate Air” (HEPA) design will capture very fine airborne elements. The particle filter is TiO2 treated and is highly efficient at removing dangerous impurities and unwanted odors.|USED BY PROFESSIONALS LifeSupplyUSA Air Purifiers Filters are made to be durable efficient for months. SAVE MONEY by ensuring the maximum airflow supply volume protecting your device.|SIMPLE TO INSTALL Installation is easy; no tools required. Simply remove and replace from your air purifier unit when needed. For maximum efficiency it is recommended to replace filter every 6 months (dependent on air quality and use).