The cat water fountain filter is constructed with a unique shape, ensuring break and practical usage, safe use. The pet fountain filters have nice filtration, easy to install, with a simple installation process for using. Features -Color:Light Grey -Material:Coconut shell, activated carbon -Size:14.00X12.50X1.70cm/5.50X4.91X0.67in - Made of coconut shell, activated carbon which features with stability, very convenient and smooth for usage. - Unique shape cat fountain filter is soft and lightweight, effectively filtering impurities in water. - Cat fountain filter, with strong adsorption capacity, effectively remove odor and in water. - Cat water fountain filter is easy to install and replace, no tools required, convenient and practical. - This pet water fountain filter make pets drink or fresh water, you could use them with confidence. Package list: 4 x Filters