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 cotton. The water is deeply purified and safer. Features: Any problem, please contact our store without hesitation. Honor to serve you! Specification: Name: Cat Water Fountain Filter Material: Activated Carbon, Resin Size: Length: 12.5cm, inner diameter: 3.5cm / 1.38in, thickness: 1cm / 0.31in Package information: Gift box packaging Package list:< br/> (4 / 8) * Filter for water fountain