Compatible with Blue Pure 411, 411+ and MINI air purifiers 411+ filter.Filter fibers are naturally to all you're is air. High-efficiency Filtration - 2-IN-1 powerful H13 grade HEPA filter captures airborne particles and , great for households with pets, improve asthma and allergies. The particle filter removes particles in a large area and in the air, including dust, pet dander, common pollutants and fabric fibers. Activated carbon mesh; A layer of carbon mesh traps light household odors, smoke, chemicals, and volatile organic compounds (VOC). Replace it every 6 months for best performance to maintain maximum filtering performance. Material:Composite material colour:White Package Contents: 2 x Air Purifiers Filters Only the above package content, other products are not included. Note: Light 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.