Drinkwell Replacement Foam Fountain Pump Filters 2 Pack When used with Drinkwell Drinking Fountains, Drinkwell Replacement Foam Filters trap any hair or debris, keeping your pet's drinking water fresh and healthy! Drinkwell Replacement Foam Filters are compatible with Drinkwell Lotus, Avalon, Pagoda, Sedona, and Stainless Steel 360 Drinking Fountains. • Keeps water fresh, clean, and healthy • Traps any hair and large debris in the water before it reaches the pump • Keeps pump cleaner in between cleanings while maintaining the fountain's flow rate • Helps extend the life of your fountain and pump Material: Sponge 20PPI, foam Dimensions: 3" x 2" x 1" Quantity: Pack includes two replacement foam filters. Filters should be changed every two to four weeks