Keep your pets water fresh and clean with PetSafe Drinkwell Replacement Foam Filters. The foam filters catch pet hair and other debris floating in the water, providing cleaner water for your best friend. The foam filter helps keep the fountain pump cleaner and maintain the fountains flow rate. The 2-pack of filters is compatible with the PetSafe Drinkwell 1/2 Gallon, 1 Gallon, 2 Gallon, Butterfly, Avalon, Pagoda, Seascape, Stainless Multi-Pet, Sedona, Seaside and Creekside Pet Fountains. Trust PetSafe to help keep your pet healthy, safe and happy.