411 Filters Fit Models: 411 Filter Combination Particle Carbon Replacement Filter compatible with for Blue Pure 411, 411, MINI, and 411 Auto air purifiers. High-quality Air: Particle filter can absorb airborne particles such as pet dander and dirt from your indoor environment, Provide a better air environment. 411 Filter Premium: HEPA filter captures 99.97% of airborne particles as small as 0.3 Micrometre. Usage: Recommended to replace filters every 6 months. To keep your air purifier running properly. Fresh air comes from the timely replacement of filters. Material: plastic colour: White Package Contents: 4 x Air Purifier Filter 1 x Cleaning Brush Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.