Replacement filter for cat fountain. Keep your cat's drinking water fresh, clean and safe. Help you take care of your cat's health. Most filters on the market are made of activated carbon. But these filters are made of high quality activated carbon, resin and cotton mesh. The water is deeply purified and safer. Features: Compatible with YOUTHINK, HOMMI, ISYOUNG, KOALAD, HAPPYPAPA, PEDY, DADYPET, automatic flower fountain and others of the same size. Size: 5 inches (outer diameter), 1.5 inches (inner diameter). Double action filters: resin and activated carbon. The resin can soften the water and reduce the risk of stones. Activated carbon can adsorb impurities and odors, keep water fresh and clean. Full grid filtering is more efficient. Water quality can be eliminated by the three 3 types of filtration. The outer cotton layer on each filter captures hair and debris. Three stages of filtration can ensure water quality and enhance the taste of soft water for your cats. Thoroughly rinse the filter with water before using, easy to mount on the pet water fountain. In order to ensure clean water, the filter should be replaced in time, please replace them within 2-4 weeks. Any problem, please contact our store without hesitation. Honor to serve you Specification: Name: Cat Water Fountain Filter Inner Material: Activated Carbon, Resin Size: Outer Diameter: 127mm/5in, Inner Diameter: 38mm/1.5in, Thickness: 8mm/0.31in Package Information: Package Size: 13.2 * 6 * 13cm / 5.20 * 2.36 * 5.12in Package Weight: 190g Gift Box Packaging Package List: 6 * Fountain Filter cat