Built-in double filtration system effectively refreshes water, promoting better health for your pets. Activated carbon provides strong adsorption to remove impurities and odors, ensuring fresh-tasting water. PP cotton filters out larger debris such as pet hair and sediment.Long-lasting performance: Each filter lasts 23 weeks. For optimal water quality, replace every 2 weeks to maintain freshness and cleanliness, providing your cat or dog with great-tasting water.Easy to install: This replacement filter is compatible with the PetSafe fountain. Rinse the filter thoroughly before use to remove any fine particles from shipping and ensure optimal performance.High precision design delivers superior water quality. The activated carbon helps reduce impurities, keeping water clean and the fountain in good condition, which reduces the need for frequent cleaning and saves time.Wide compatibility: This pack includes 8 replacement filters designed to fit PetSafe Drinkwell fountains, including Avalon, Pagoda, Seascape, Sedona, and 8-gallon models. If you have any questions, feel free to we are committed to customer satisfaction.Note: Measurements are manually taken; please allow 13 cm variation. Due to differences in lighting and display settings, colors may vary slightly from the images. Please refer to the actual product received.