1.AdvantageReplacement filter for cat fountain. Keep your cat's drinking water is fresh, clean and safe. Helping you to take care of your cat's health. Most of the filters in the market are made of activated carbon. But this filters are made of high quality activated carbon, resin and cotton mesh. The water is deeply purified and safer.2.FeaturesHigh-quality and Durable MaterialThe water fountain filter is made of good quality activated carbon and cotton material, durable and reusable.Healthy HelperThe water fountain filter filters hair and residue, removes odors and soften water, which is easy to disassembly and cleaning.3.Fountain AccessoryThe filter is your pet fountain's necessary accessory. Own it, and provide your loving pet a healthy environment.