The Hagen 91401 is the correct replacement filter for the following water fountains:
The Dogit Design Fountain Filter Cartridges - 3 Pack is a replacement set of carbon filters for the Fresh and Clear Outdoor Drinking Fountain. This three pack of pet drinking fountain replacement filters absorbs impurities from water, including debris, food, hair, and sediment. With these Dogit Design filters you will be able to provide your pets with fresh and clear drinking water that benefits their health.
Dogit Design Fountain Filter Cartridges - 3 Pack specifications: