Includes 1 foam pre-filter and 3 charcoal filters for the Drinkwell Outdoor Dog Fountain. Each filter features a duo-density polyester pad that catches hair and debris, while the charcoal removes bad tastes and odors from the water making it more appealing to drink. Filters help keep your pet's water clean and fresh and also extend the life of your fountain. Replace them every 2-4 weeks.
Comes in a 3 pack or year supply.