This HEPA replacement filter is for the Electrolux Oxygen 3 PlasmaWave Air Purifier. The filter should be changed regularly to keep the cleaner working at top performance - an indicator light on the unit shines when replacement is necessary. HEPA filtration captures 99.97 percent of airborne dust, allergens, bacteria and odors from the air that passes through it. This is the most important filter for your air quality. 

Fits models: EL490 and EL491

Electrolux Part # 79150