16 Pack Pet Fountain Filter Replacement,8 Carbon Filters and 8 Foam Pre-Filter Replacement Compatible with Multiple Pet Water Dspensers Water BowlPackage Contain 4 Carbon Filters and 4 Foam Pre Filter Replacement. Activated carbon can filter hair, chlorine, heavy metals, and odors, keeping your pet drink healthy water. The sponge can filter the hair and particles in the water very well, so the water is cleaner and the pump can be protected at the same time. Each carbon filter is sealed and individually packaged to keep the quality of the filter Please replace the dog cat water fountain filters