Compatible with Blueair Blue Pure 411, 411+ and MINI air purifiers Contains 2 high-efficiency 2-in-1 filtration systems, including particulate filters and activated carbon filters The particle filter gets rid of debris in a enormous field and within the air, including dust, puppy dander, common pollution and upholstery fibers. Carbon filters can suppress household odors, smoke, chemical compounds and volatile organic compounds. Replace it each 6 months for excellent performance. colour: white Material: PP+activated carbon cotton Package Contents: 2 x Air Purifiers Filters Only the above package content, various products aren't included. Note: Light shooting and various exhibits could cause the color of the object in the picture slightly varied from the real thing. The size allowed error is +/- 1-3cm.