Compatible with Blueair Blue Pure 411, 411+ and MINI air purifiers Contains 2 high-efficiency 2-in-1 filtration systems, adding particulate filters and activated carbon filters The particle filter out gets rid of particles in a enormous discipline and within the air, adding dust, pet dander, regular pollutants and upholstery fibers. Carbon filters can suppress family odors, smoke, chemical substances and unstable organic compounds. Replace it each 6 months for tremendous performance. colour: white Material: PP+activated carbon cotton Package Contents: 2 x Air Purifiers Filters Only the above equipment content, various item are usually not included. Note: Light taking pictures and diverse displays can cause the colour of the object within the photo just a little various from the genuine thing. The size allowed error is +/- 1-3cm.