[ HIGH COMPATIBITY ] - Compatible with Petsafe pagoda/Avalon. The cat water fountain filter replacement is accurate in size and easy to install. [ MULTIPLE FILTRATION ] - The pet fountain filter replacement is saturated filled with premium activated carbon and and non-woven fabric, fully isolate cat hair and food residue, remove impurities and particles, filter heavy metals and odors, soften tap water and obtain clean and fresh water for your pets. [ PROTECT YOUR PET ] - This pet water fountain filter for cats inside is made of high-quality materials, safe and odorless. It plays an important role in improving water quality and protecting the health of pets' urinary system to keep your pet healthy. [ REGULAR REPLACEMENT ] - In order to ensure the health of your pets, please maintain the habit of changing the replacement filters for dog and cat water fountain every half month and the pre-filter foams every one month. [ FOAM PRE-FILTER REPLACEMENT ] - Pack of 6; It can pre filter the particles in the water, protect the water pump from inhaling impurities, contribute to the optimal performance of the pump, and ensure long-term operation of the pump. pet cat filters for water fountain/water fountain filter for cats inside/cat fountain filter for drinking/pet water fountain filter for cats dog/cat feeding & watering supplies. Material: Activated carbon, sponge, 8 pieces per box; Single box size: 10 * 6.3 * 14CM weight: 0.13kg; Compatible with Petsafe pagoda/Avalon ceramic pet automatic fountain water dispenser water dispenser