You will receive 12 cat fountain filters. Enough to meet your needs to provide your pet with clean drinking water. The fountain filter is compatible with the Catit PIXI 43717 cat fountain. Please check the model of your water dispenser before purchasing. The water dispenser filters are made of activated carbon, filter cotton, and cationic resin. They filter hair and heavy metals and improve the taste of the water, which is good for your pet. They keep the water fresh and encourage pets to drink more, so they can enjoy clean, fresh water throughout the day. Fountain filters provide clean, flowing drinking water for cats and dogs, help increase water consumption, and reduce the risk of urinary incontinence. Rinse the cat fountain filter sponge under running water before use. It is recommended to replace the filter sponge every 2-4 weeks and clean the fountain regularly. Note: All data is measured manually, so a deviation of 1-3 cm is possible. Due to different lighting conditions and