Compatibility: the filter is compatible with DownyPaws DPWFP6 the wireless cat drinking fountain MULTIPLE FILTRATION Our pet fountain replacement filter consists of a sponge layer, an activated carbon layer and an ion exchange resin layer. The sponge can catch cat hair and dirt, effectively filter hair and heavy metals, keep water fresh and improve water quality. The ion exchange resin layer can soften tap water and the carbon layer can remove odours. High-quality materials: the pet water dispenser filters are made of high density cotton, activated carbon and ion exchange resin. The materials are soft and reliable and provide your pets with a better water cleaning effect. We have added 30% more raw materials to each filter, so you can provide your pet with a more comprehensive filtering experience and drink healthier water Easy to use: the filter of the pet drinking fountain is easily removable to allow cleaning the pump and replacing the foam filter Package List: you will receive 8 pcs filters, 4pcs sponges