Value pack of 8 filters. Cat Fountain Filters are individually wrapped and sealed to maintain high quality. Compatible with the 84oz/2.5L Elliptical Pet Fountain. Composed of a layer of cotton, activated carbon and an ion exchange resin. They can filter hair, heavy metals and improve the taste of water, so that pets can drink clean and fresh water, healthier than others only have two filter materials. Our cat fountain filters provide clean, fresh water for your pet, helping to increase water intake and reduce the risk of urinary tract infections. Note: Rinse the filter with water before use. Replace the tool every 2-4 weeks. Worried about the freshness of the drinking water in the fountain? Worried about your pet getting sick? No worries, our cat fountain filter will solve your problem. Designed with an improved triple filtration system including activated carbon, ion exchange resin and a cotton net. TIP Carbon dust or ion exchange resin may be released during the life of the filter, which is not harmful to your pet.