Keep your cat water fountain running at its best with Catit Drinking Fountain Replacement Foam and Carbon Filters. This 3-pack of carbon-foam replacement cartridges is designed for Catit Fresh and Clear Drinking Fountains (items 111132 or 109898). Perfect for cat owners looking for compatible, hassle-free fountain maintenance and accessories. Each cartridge features carbon-foam construction and is made specifically for the listed Catit models.