Replacement Filter for Fountain: Our cat water fountain filter will remove impurities and odors and keep your cat's drinking water clean and safe, which is ideal for healthier pets. High-quality Material: Made of cotton and activated carbon layer, our cat water fountain filter can improve the taste of the water so that the water is deeply purified. Pet Accessories: The cat water fountain filter is used with pet water fountains to increase the amount of drinking water for pets and helps reduce the risk of urinary tract infection. Quick to Install: It is quick to assemble and replace the cat water fountain filter. Don't forget to check your cat fountain and if the filters match. Good for your pets: With the help of our cat water fountain filter, your pets can drink plenty of water more easily and it also helps reduce the risk of urinary tract infection.