Cat fountain filter, 4 filters + 4 sponges, cat fountain filter with resin and activated carbon

Compatibility: Our cat water fountain filter is compatible with 2L, 3.2L and 4L stainless steel water fountains with faucet. Buy our filters with confidence, as we are the original manufacturer of high quality cat water fountain filters. Don't worry about size; it fits perfectly with the listed stainless steel cat water fountain models.Triple Filtration: The water fountain replacement filter is made of multiple layers of high-quality activated carbon and cotton to form a triple filtration system that can effectively remove hair and heavy metals and improve the taste of the water.Allowing your pet to drink fresh, clean water throughout the day increases their water intake and reduces the risk of urinary infections.Regular replacement: Carbon filters for pet water fountains should be replaced every 4 weeks. (Bacteria multiply more easily in warm weather. Please replace the activated carbon filter from time to time. Every two weeks, and the foam filter every two months to keep the water fresh.)[Warm Tips] To prevent activated carbon dust (which will not harm your pets) from falling into the water, soak the filter in water for 5 minutes before use, then rinse it thoroughly under running water.