Features: high quality, Made of high-quality materials, durable Contains 2 high-efficiency 2-in-1 filtration , including particulate filters and activated carbon filters The particle filter removes particles in a area and in the air, including dust, pet dander, common pollutants and fabric fibers. Carbon filters can suppress household odors, smoke, chemicals and volatile organic compounds. Replace it every 6 months for best performance. As part of normal maintenance, it can be easily removed and replaced Applicable model:For Blue Pure 411, 411+ and MINI colour: White & Black Material: PP+carbon cotton Package Contents: 2 x hepa filter 1 x clean 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.