Continue enjoying fresh indoor air with the GermGuardian HEPA Genuine filter replacement. It's fitted with a carbon filter that captures allergens, pet hair, smoke and pollen to improve your air quality. This 360-degree HEPA filter can capture up to 99.7% of allergens and dust in your home. It fits the AC4200 air purifier (sold separately). | GermGuardian FLT 4200 Hepa Genuine Filter for AC4200 Air Purifier