The 4-Pack of Replacement Frigidaire ULTRAWF Pure Ultra Water Filter in White is a high-quality water purification solution designed specifically for Frigidaire refrigerators. With the Pure brand guaranteeing clean and fresh water, this set of 4 filters is compatible with models like WF3CB and ULTRAWF. Ideal for keeping your water supply pure and clear, these filters are easy to install and will extend the lifespan of your refrigerator's water filtration system. Trust in Pure to provide you with reliable and efficient water filtration for your household.