【Wide Compatibility】16 Pack Cat Water Fountain Filter Compatible with Multiple Models, Please Check Your Fountain Brand Before Purchasing. 【Keep Your Pet Healthy 】Each cat fountain filter is made of activated carbon and non-woven fabric. They can filter hair, heavy metals and improve the taste of water, so pets can drink clean and fresh water all day, which helps to increase water intake and reduce the risk of urinary tract infections. 【Material improvement】The general cat filter water fountain is coarse and equipped with very few materials. Our replacement cat fountain filter is made of premium materials, the cotton mesh is soft, and the filter element is increased by 40% saturation. Therefore, the service life is longer. 【Replacement frequency】It is recommended to change the replacement filter every 2-4 weeks to keep the water clean.always care about the pet drinking water health and help pets enjoy drinking water. 【Tips】To prevent activated carbon dust from falling into the water,