Compatible with Blue Pure 411, 411+ and MINI 411+ air purifiers. The filter fibers are naturally antibacterial to ensure all you get is fresh air. High-Efficiency Filtration - Powerful H13 grade 2-IN-1 True HEPA filter captures airborne particles and allergens, perfect for households with pets, improves 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. of activated carbon; A layer of traps light household odors, smoke, chemicals, and volatile organic compounds (VOCs). Replace it every 6 months for best performance and to maintain peak filtering performance. Material: Composite material Color: White Package Contents: 4 x Air Purifier Filters Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.