Compatible with the WF050 and WF100 cat fountains. This replacement cat fountain filter features a triple filtration system with sponge, ion exchange resin, and activated carbon. This binds activated carbon and resin, effectively trapping hair and debris, improving water quality, increasing oxygen levels, and extending the life of the fountain pump. The high-density, high-content activated carbon filter effectively filters hair and heavy metals, keeping your pet's water clean and fresh. This cat fountain filter is easy to remove for cleaning the pump and replacing the foam filter. Soak the fountain filter in water for 10 minutes before use and rinse thoroughly under running water. The fountain filter ensures healthier drinking water for your pet by keeping your cat's and dog's drinking water as clean as possible. Color: Black and white. Material: Carbon fiber. Package contents: 16 * Filter sponge. Only the above package content, other products are not included. Note: Light reflection