PETKIT Pet Water Fountain Filter Units 3.0 for Cat Dog Water Fountains

The PETKIT Pet Water Fountain Filter Units 3.0 is a set of 4 filter units designed specifically for cat and dog water fountains. Made from a combination of mesh and activated carbon, these filters effectively remove impurities and ensure clean, fresh water for your furry friends. The PETKIT brand ensures quality and reliability, making these filter units a convenient and essential addition to your pet's water fountain. opened 1 that's why there is only four are still sealed