• Exquisite material: cat fountain filter made of PP cotton, resin, and activated carbon from coconut shells. • Effectively filters impurities and traps dirt, providing clean and fresh drinking water for pets. • Easy installation: fully immerse the filter in water before use and connect to the water dispenser. • We recommend changing the filter every 2-4 weeks to keep the water clean. • Three-layer filtration system: coconut shell activated carbon with strong adsorption capacity. • Ion exchange resin replaces heavy metals and softens water quality. • Provides high-quality water resources: traps pet hair and dust, eliminates odors, and softens tap water. • Compatible with F-016B cat fountain filters. Check model number before purchasing.