Foam Filter For Drinkwell Stainless Steel 360, Lotus, Avalon, And Pagoda Features Trap large debris and hair in the water. Help keep the pump cleaner in between cleanings. Maintain the fountain's flow rate, keeps water tasting fresh Provide a better quality of living for your pet with Pet Safe. Change every 1-2 months to maintain your pet fountain Specification: Colour: White Material: Foam Included: 16 x Foam filter