1. Compatible with FLT4825 FLT4800 AC4300 AC4800 AC4900 series, easy to install. 2. Professionally Designed for Air Purifier Models AC4300BPTCA, AC4900CA, AC4825, AC4825E, AC4850PT,AC4900CA, Model AP2200CA and BXAP148. 3. Help your for air filter system is adequate to your needs. It will capture 99% . Maintain a powerful suction and prolong lasting of your purifiers. Offer a good way to enjoy a healthier and happier life. 4. Multi Levels. an 30% thicker activated charcoal layer removes odors from the air or from gases or liquids in your house, and captures larger air contaminants like pet hair. Second, a thick HEPA filter captures small particles as tiny as 0.3 Micrometres, like pollen, and dust . 5. A healthier lifestyle! wants to breathe dirty air in their home, if you don't clean your air filter it will be what you will do! Replacing the filter helps clean the air in the air purifier and make your life healthier! colour: black+white Material: Composite material size: 40.5x12x4cm Package Contents: 2 * air purifier 4 * sponge 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.