Keep your furry friend's water supply clean and fresh with PetSafe Drinkwell Replacement Carbon Filters. This pack of 12 white filters is designed to fit in the PetSafe Drinkwell 2 Gallon Fountain. These filters are made with high-quality materials to remove bad tastes and odors from the water, ensuring your pet always has access to clean drinking water. With a unit type of "unit" and a brand of "branded," these filters are a reliable addition to any dog owner's supplies.