Package includes: you will receive a sufficient amount of cat water fountain sponge filter, enough quantity can meet your use and replacement needs, provide clean drinking water for your pets Size Information: The pet water fountain foam filter is specially designed , to be compatible with the 84 ounce/ 2.5 liter cat water dispenser; Please pay attention to the size before buying to avoid the wrong purchase High quality material: the cat fountain filter is made of sponge, provides good filtration for the pet water fountain, bring clean and fresh water to your pets, so your pets ready are to drink more water Filter impurities: The cat water fountain sponge filter can filter impurities well, catch pet hair and debris, ensure every drop of water is healthy, make the water cleaner and fresher, and extend the life of the Extend pump Warm Tips: The cat fountain sponge filter is not suitable for repeated use; Since the filtered impurities remain on the sponge, it is better to replace the sponge filter every 2-3 weeks