About This Perfect Compatibility:APAUK's replaceable filter and sponge are only compatible with this pet water fountain 108oz/3.2L (APFSS-3201) Independent packaging:The box contains 4 replaceable filters and sponges, which is more cost-effective. weeks of drinking water. Multiple filtration systems:The carbon filter features a triple filtration system that includes a cotton layer, activated carbon, and ion resin, which helps to remove odor, soften water, and improve the taste and quality of your pet's drinking water. For your pet’s Health:The filter can effectively prevent pet hair, impurities, etc. from entering the water tank, and after multiple filtrations, your pet can drink clean water. 7*24 customer service: The APAUK team provides 7*24 hours online service. If you have any questions or concerns about our products, please contact us directly via email. Overview Color : Fountain Replacement 4 Filters + 4 Sponges Brand : APAUK Product Dimensions : 8.66"L x 4.13"W x 0.91"H Manufacturer : APAUK