Description Replacement filter for cat fountain. Make sure your cat’s water is fresh, clean and healthy. 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 nylon. Water is deeply purified and safer Features: Pack and Size: Value pack of 4 filters. Compatible with the PingPin fountain. Size: Diameter: 9.9cm / 3.9in; thickness: 8mm / 0.31in. Dual 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. 3-layer filtering: Water quality can be improved through 3 types of filtration. The outer nylon 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. Easy to use: Rinse the filter with water before using, easy to mount on the pet fountain. In order to