General description These 16 Pack Foam Pre-Filters and Carbon Filters are designed to be compatible with PetSafe Drinkwell INOX 360, Avalon, Pagoda, and Seascape fountains, as well as Sedona fountains. They help ensure your pet has access to cleaner and healthier water while extending the life and flow rate of the filter pump. Technical specifications Pack includes 16 foam pre-filters and carbon filters Compatible with Drinkwell, Lotus, Avalon, and Pagoda pet water fountains Usage Please replace the foam pre-filter and carbon filter every 2-4 weeks depending on usage to maintain optimal performance.