PETKIT FILTER 2.0 is compatible with PETKIT EVERSWEET 2.0 and 3.0 smart water fountains for dogs and cats. The filter element is fully upgraded with raw materials supplied by UK Purolite to improve cleaning capacity. High-density microporous filter floss removes fine particles and pet hair. Large-diameter coconut shell activated carbon provides deep filtration, dechlorination, and reduces microbes for improved water taste. Ion exchange resin helps soften water and remove calcium and magnesium ions that may contribute to pet urinary stones. Note: 1. Product dimensions are measured manually; a 2-3mm variation may occur due to different measurement tools and methods. 2. All items are photographed in person, but slight color differences may exist due to lighting, photography, screen settings, or personal perception. The actual product color takes precedence. 3. Please take good care of this product.