This 4 pack replacement filter for Fellowes AERAMAX DX5, 90, DB5, and 100 air purifiers is essential for anyone desiring cleaner air. The filters are made with activated carbon technology, capable of capturing allergens and unpleasant odors, ensuring that your room remains fresh and comfortable. Additionally, these filters have a lifespan of 3 months, making them both reliable and cost-efficient. The black tower has a matte finish, making it ideal in any room, and it can be mounted on an air vent to ensure easy installation. Its compact size of 16 inches in height and depth makes it a perfect fit for any room. It has a low operating sound rating of 100 dB and 4 different speeds to choose from.