HKM-2163773 Activated Carbon Filter for Pet Fountains - 4/8/12 Packs, Resin & Carbon Filtration, Keeps Water FreshIntroducing the HKM 2163773 Activated Carbon Filter for Pet Fountains, designed to ensure your furry friend always has access to fresh and clean water. Available in convenient 4, 8, or 12 packs, this filter is compatible with the DownyPaws? WF070 automatic fountain and is crafted to fit seamlessly into your pet's hydration system. Each filter features a thoughtful double effect design that combines resin and activated carbon. The resin component works