Premium 3-in-1 True HEPA filter replacement with Activated Carbon for Proton Pure air purifier GXZ-AP01 Compatible with original Proton Pure air filter 3 Stages Filtration: Preliminary filter traps any large particles such as hair, debris, pet fur. High quality HEPA filter removes lint, fine dust, pollen etc from the air. Activated Carbon removes household unfavorable Odors, smoke and harmful VOCs. 2 filters included. Suggest replacing the filter every 6 months the most to optimize the performance. Size 5.63" x 5.63" x 5.39". Quality meets or exceeds the leading national brand Premium 3-in-1 True HEPA filter replacement with Activated Carbon for Proton Pure air purifier GXZ-AP01. Compatible with original Proton Pure air filter. 3 Stages Filtration: Preliminary filter traps any large particles such as hair, debris, pet fur. High quality HEPA filter removes lint, fine dust, pollen etc from the air. Activated Carbon removes household unfavorable Odors, smoke and harmful VOCs. 2 filters included. Suggest replacing the filter every 6 months the most to optimize the performance. Size 5.63" x 5.63" x 5.39".