PetSafe Drinkwell Replacement Foam Filter for Dog and Cat Water Fountains, 2 Pack GUARANTEED FIT: The only filter brand guaranteed to fit PetSafe Drinkwell Stainless Multi-Pet, Avalon, Pagoda, Seascape and Sedona Pet Fountains FILTERED WATER: Replaceable foam filter catches hair and debris, keeping your pet's water clean and fresh PROTECTS PUMP: Helps extend the life of your water fountain pump EASY-TO-REPLACE: Easily removes for pump cleanings and foam filter replacement; change every 1-2 months to maintain your pet water fountain PRODUCT SUPPORT: PetSafe brand's US-based Customer Care experts will be glad to help; call Monday through Saturday at 1-800-845-3274 EXPERIENCE: PetSafe brand has been an industry leading US manufacturer of pet behavior, containment and lifestyle products since 1991, helping millions of people and pets each year