3pcs Cat Water Fountain Replacement Activated Carbon Filters for mini Pet Water Drinking Fountain DispenserIn- In- Advantage Replacement 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. Features High-quality and Durable Material The water fountain filter is made of good quality activated carbon and cotton material, durable and reusable. He Helper The water fountain filter filters hair and residue, removes odors and soften water, which is easy to disassembly and cleaning. Fountain Accessory The filter is your pet fountains necessary accessory. Own it, and provide your loving pet a he environment. Notice * The charcoal filter should be changed every 3 to 4 weeks. * Tip: Please soak in water for five minutes before using. * Because there are many shapes of filters, please check your cat fountain and check if the filters are match. If you need other shapes, be free to contact with us, we will recommend to you. We always want to solve the problem in peace, if there is any problem after you received the package, please be free to contact with us, instead opening the dispute directly, thanks for your kind communication.