Dimensions: 7.75L x 7.75W x 0.3H in. Packaged with 3 units. Screens out or eliminates chemicals and impurities. Features mesh screens for particle filtration. Activated carbon removes foul taste and odor. Utilizes Ion exchange resins to eliminate heavy metals. Only for use with PETKIT Eversweet Smart Fountain waterer. Maintain your PETKIT Eversweet water fountain with the Petkit Eversweet Smart Pet Waterer Replacement Filters. This set includes three filters that help to keep the water fountain working like new. Activated carbon absorbs odor-causing impurities and improves the taste of water. In addition, the filters feature ion exchange resins that eliminate dangerous heavy metals.