Original Replacement Filters from eufy: Exclusively designed to perfectly fit into your eufy Cat Water Fountain with 100% guaranteed compatibility. eufy product, superior quality. Love your pet, use eufy instead.Unique 5-Stage Water Filtration: Industry-leading advanced 5-stage water purification system ensures safe, clean, fresh and healthy water for your lovely cat / dog.6 Replacement Filters in 1 Pack: The great-value pack with 6 replacement filters (3 sets) included. 3 x white filters (stage 1-4) and 3 x green filters (stage 5) are included in 1 pack.Longer Lifespan, Less Replacement: Each set (1 white + 1 green) can last for 2-3 months, and 3 sets together can last for 6-9 months in total. Longer lifespan means less replacement required.Last for Months, Replace in Minutes: Washable and removable design makes it easy and convenient to take out, clean / change and put back with bare hands in minutes.