1. The sealed two-stage 360-degree filtration system includes a HEPA filter and an activated carbon filter. It can effectively capture 99.97% of airborne particles as small as 0.1 microns, helping to provide cleaner air for individuals with allergies, rhinitis, or young children. 2. This kit features an activated carbon filter with a higher concentration of activated carbon particles compared to other filters, enhancing the air purifier’s ability to reduce odors and improve air quality. 3. The filter is easy to install and reusable. After rinsing with warm water and air-drying thoroughly, the filter can be reinstalled to help maintain optimal performance. With proper care, it can last up to 12 months. 4. Compatible with Dyson Air Purifier models: HP04, TP04, DP04, TP05, HP05 Purifying Fans. 5. It is recommended to replace the filter every 6 to 12 months depending on usage to help maintain efficient operation of your Dyson air purifier. Color: As shown Material: Plastic Size: 22 x 21 cm Package Contents: 2 x Inner filter 2 x Outer filter 1 x Cleaning brush Note: Light shooting and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.