The Petsafe Drinkwell 360 & Ceramic Fountain Foam Pre-Filters keep your pet's water bowl clean and your best friend healthy. Pre-filters trap large debris, including hair, and prevent the pump from becoming damaged. As a result, overall flow is improved and your pets receive the healthy water they deserve. The PetSafe Drinkwell 360 & Ceramic Fountains Foam Pre-Filters fit Drinkwell Stainless Steel 360, Lotus, Avalon, Pagoda and Sedona waterers. 2-pack replacement water filters Traps large debris and hair Keeps your pet's water pump cleaner Delivers healthier water to your pet Promotes efficient flow Fits these Drinkwell fountains: Stainless Steel 360, Lotus, Avalon, Pagoda & Sedona