For 84oz/2.5L: ONLY COMPATIBLE WITH 84oz/2.5L PET FOUNTAIN (Filter size: 4.8 x 4.8in). Not compatible with 95oz/2.8L pet fountain. Please check your original cat water filter model before purchase. Including: Value pack of 8 filters & pack of 4 pre-filter sponges.The cat fountain filter and pre-filter sponges are individually packaged and sealed to maintain high quality. Material: Composed of a cotton layer,activated carbon and an ion exchange resin.They can filter hair, heavy metals, and improve the taste of the water so that pets can drink clean and fresh water, more healthier than other only have two filter materials. Guarding Pet Health: Our cat fountain filters provide clean, fresh water to your pet, which helps to increase water consumption and reduce the risk of urinary tract infections. Note: Rinse fiter with water before use. Replace fiter every 2-4 weeks. Introducing the Comsmart Pet Fountain Filter Set, specifically designed for your 84oz/2.5L pet fountain. This value pack includes 8 filters and 4 pre-filter sponges, all individually packaged and sealed to ensure high quality. The filters are composed of a cotton layer, activated carbon, and an ion exchange resin, providing superior filtration that eliminates hair, heavy metals, and improves the taste of the water. These filters help increase water consumption and reduce the risk of urinary tract infections in your pet. For optimal performance, rinse the filter with water before use and replace it every 2-4 weeks. The Comsmart Pet Fountain Filter Set is not compatible with 95oz/2.8L pet fountains, so please check your original cat water filter model before purchase. Experience the benefits of clean, fresh water for your pet with the Comsmart Pet Fountain Filter Set.