Replacement filter for cat fountain. Keep your cat's 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 from high quality activated carbon, resin and cotton. The water is deeply purified and safer. Features:Economical pack of 12 filters.Compatible with YOUTHINK, HOMMI, ISYOUNG, KOALAD, HAPPYPAPA, PEDY, DADYPET, automatic flower fountain and others with 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 absorb impurities and odors, keep water soft and clean. PP cotton can filter hair, sediment and debris to clean water.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 improve the taste of fresh water for your cats.Rinse the filter thoroughly with water before using, easy to mount on a pet fountain.In order to ensure clean water, the filter should be replaced in time, please replace it within 2-4 weeks.Any problem, please contact our store without hesitation. Honor to serve you! Specification:Name: Cat Water Fountain FilterInner material: activated carbon, resinSize: Outer Diameter: 127mm, Inner Diameter: 38mm, Thickness: 8mm Package Information:Package size: 14 * 14 * 11.5cm / 5.5 * 5.5 * 4.52inPackage weight: 168g Package list: 12*Cat Water Fountain Filter