Package includes: you will receive sufficient quantity of sponge filters for cat drinking fountains, sufficient quantity can meet your use and replacement needs, providing clean drinking water for your pets Size information: the pet fountain foam filter is specially designed to be compatible with the 84 oz/ 2.5 liter cat water dispenser; Please pay attention to size before buying to prevent wrong buying Quality material: the cat fountain filter is made of sponge, offers nice filtration to the pet water fountain, brings clean and fresh water to your pets, making your pets be willing to drink more water Filter impurities: the cat drinking fountain sponge filter can filter impurities well, capture pet's hair and debris, ensure that every drop of water is healthy, make the water cleaner and fresher, and extend the service life of the pump Warm tips: the cat fountain sponge filter is not suitable for repeated use; Since the filtered impurities will remain on the sponge, it is more suitable to replace the sponge filter every 2-3 weeks