The cat water fountain filter is constructed of sponge and carbon with a unique shape, ensuring break and durable usage, to safe use. The pet fountain filters have nice filtration, easy to install, with a simple installation process for using. Features -Color:As shown -Material:Sponge, carbon -Size:11.40X5.70X2.20cm/4.48X2.24X0.86in - Compatible with the pet water fountain, ensuring the health and safety of pets' drinking water. - Made of carbon and sponge material, effectively removing odor and impurities in water. - Providing ample supply, filters for cat water fountain are easy to replace, and practical. - Long-lasting filtration, can be used for several weeks, reducing the frequency of replacement. - The pet fountain filter can filter hair, , and could improve the taste of the water. Package list: 6 x fountain filters