Compatible with the WF050 and WF100 cat fountains. This replacement cat fountain filter uses a triple filtration system with sponge + ion exchange resin + activated carbon. This binds activated carbon and resin, effectively traps hair and dirt, improves water quality, increases oxygen levels, and helps extend the life of the fountain pump. High-density, high-content activated carbon filter effectively filters hair and heavy metals. Keep your pet's water clean and fresh. This cat fountain filter is easy to remove for cleaning the pump and replacing the foam filter. Please soak the drinking fountain filter in water for 10 minutes before use and rinse it thoroughly under running water. The drinking fountain filter contributes to your pet's health by keeping your cat's and dog's drinking water as clean as possible. Color: Black and White Material: Carbon Fiber Scope of delivery: 16 * Filter Sponges Only the above package content, other products are not included. Note: Light reflection and