8 Pack - Cat - Water - Fountain - Filters with 8 Sponges, Replacement Filters for 67oz/2L Pet Drinking Fountain Dog Water DispenserReplacement Filters for Cat Water Fountain: The cat water fountain filter is compatible with 67oz 2L pet water fountain. Four layer Circulation Filtration System: The cat fountain filter is made up of PP cotton layers, activated carbon, and ion exchange resin, which provide better performance. It eliminates effectively heavy metals and small suspended particles and improves the taste of the drinking water, which helps pets to drink more water and