Pack of 2 - Age Range Description: No Age Limit Included Components: Drinkwell&Reg; Replacement Foam Pre-Filters PROTECTS PUMP: Foam filter helps extend the life of your fountain pump by catching hair and debris before it reaches the pump EASY TO REPLACE: Easily removes when you clean your pet’s fountain. Replace the foam filter every 1-2 months to properly maintain your pet fountain QUALITY GUARANTEED: PetSafe brand has been a trusted global leader in pet behavior, containment and lifestyle innovations for nearly 30 years; we help pets and their people live happily together