Features: They can filter hair, heavy metals and improve the taste of water so that pets can drink clean and fresh water all day long. and, which contributes to; increase water consumption and reduce the risk of urinary tract infections. Features: Material: quality activated carbon; superior, cotton and ion exchange resin White color Package includes: 8 cat water fountain filters Recommendation: 1.Replace the pet fountain filter every 2-5 minutes. 4 weeks to keep the water clean. 2. Replace more frequently if multiple pets use the drinking fountain, thoroughly rinse the filter of the cat drinking fountain with water before use.< / P>