• 42-piece replacement kit including 14 U-shaped filters, 14 pump sponges, and 14 square filters. • Advanced 5-stage filtration system with non-woven fabric, active carbon, and resin. • Designed to remove impurities, hair, food debris, chlorine, bad odors, and heavy metals. • Specifically compatible with the Feelneedy 4L automatic fountain model YPD-C004 with sensor. • Each component is individually packaged to protect against moisture and ensure hygiene. • Includes anti-clogging protective sponges that extend the water pump's lifespan and ensure quiet flow. • Easy installation: it is recommended to soak the replacement for 5 minutes and rinse before placing.