Perfect Fit: This cat water fountain filter is compatible with stainless steel 67 oz/2L, 101 oz/3L, 108 oz/3.2L pet water fountains. Please check your machine model carefully before purchasing! 20 Packs : Each contains 20 packs of pet fountain replacement filters and 20 sponges. They are individually wrapped and sealed to ensure the highest quality. Depending on your pet's drinking frequency and the number of pets using the fountain, we recommend that you clean it once a week and change the cat water fountain filter 1 to 2 times a month to maintain fresh and clean water. Easy to Install and Clean: This pet fountain filter replacement is easy to remove and apply a one, and saves you tons of time when cleaning! Please soak the pet fountain filter and sponge in water for at least 3 minutes before use to stimulate the best filtration effect of the cat fountain filter, and then rinse thoroughly with running water. This keeps cat water fresh for a longer period of time. Triple Circulation Filtration: The cat fountain filter replacement features a comprehensive 3-fold filtration system, consisting of activated carbon, ion exchange resin, and non-woven fabric. Together, they effectively filter out impurities, such as hair and heavy metals, while improving the taste and quality of the water. This helps to keep your pets healthy and hydrated by providing them with clean and fresh water throughout the day. Reliable Material and Service: This filter for cat water fountain for cat water fountain is made of BPA-free materials and will not affect your pet's health, you can use them with confidence. Type: cat water fountain Type: pet fountain filter Product Benefits: Removes Dust, Removes Odor, Removes Bacteria, Fresh Water All the Time, Removes Pollutants, Removes IronRemoves Dust, Removes Odor, Removes Bacteria, Fresh Water All the Time,