PETKIT Filter Unit Rect for EVERSWEET MAX Cordless Water Fountain, Replacement for 105 fl oz/3L Automatic Cat Fountain, 5 packCompatibility: This cat water fountain filter is suitable for the eversweet max cordless dog water fountain, please make sure these cat fountain filter replacement size is compatible with your cat fountain before purchase. Muti layer Filtration System: Utilizing double filter components and a high density micropore filter, PETKIT filter unit rect remove pet hair and most other impurities, ensuring your pets always drink the most clean and fresh water.