Replacement filter for the cat fountain. Keep your cat's drinking water fresh, clean, and safe. Help in taking care of your cat's health. Most filters available 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 . Characteristics: Promotional set of 4 filters. Dual 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. The water quality can be removed with three 3 types of filtration. The outer layer of cotton on each filter traps 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 use, easy to mount on the pet fountain. To keep the water clean, filters need to be replaced in time, they should be replaced in 2 to 4 weeks. Specification: Name: Cat Water Fountain Filter Material: activated carbon, resin Size: length: 12.5cm/4.9in, inner diameter: 3.5cm/1.38in, thickness: 1cm/0.31in Package List: 4 * Cat Water Fountain Filter Package Information: Package weight: 74g Gift wrap