Package contents: You will receive 8PCS Fountain Sponge Filter Replacements in Black. Sufficient quantity meets your needs in providing clean drinking water for your pets. Size: These pet sponge filters are measured 6.5x3cm, the pet sponge filters replacements are compatible with 2.5L/2.4L cat water dispenser.(Please confirm the size before buying.) Premium Material: These cat fountain filters are made of high quality polyurethane sponge, providing good water purification effect for pet drinking fountains, let your pet drink clean water and more willing to drink. Filter impurities: This filter sponge can filter out impurities, especially pet hair and other debris, to ensure that every drop of water your pet drinks are clean.In addition, the filter sponge can extend the service life of the water supply pump. Warm Tips: The sponge filter is not suitable for repeated use, because some impurities after filtration will remain on the sponge, it is recommended to replace it every 2-3 weeks.