100% compatible with Cat Mate and Dog Mate Fountain models Made with activated charcoal which is most effective at removing chlorine, sediment, volatile organic compounds (VOCs), taste and odor from water A longer lasting filter that requires less frequent changes. Extends fountain life & improves pump performance Value Pack of 10 Filters Pet Standard Replacement Water Filter Cartridges for Cat Mate & Dog Mate Fountains provide clean, fresh water to your pet. The duo-density pad on each filter captures hair and debris and the charcoal remove odors and eliminates bad taste. Your dog or cat will surely love the clean, pure taste of freshly filtered water. For use with Cat Mate brand fountains.