The ULTRAWF water filter is used in a variety of refrigerators. It is a replacement for many refrigerators by Frigidaire. The ULTRAWF replaces multiple filter part numbers. It is compatible with such part numbers as 46-9999, 242017800, ULTRA-WF, and more. DiscountFilters.com offers the ULTRAWF with a one year compatibility guarantee. Check our cross reference chart below to see if your part number is a match. The replacement ULTRAWF is an attractive water filter for many reasons. It can remove unhealthy contaminants found in your water supply. The ULTRAWF protects against chlorine, chemicals, cysts and dirt. Your home will have cleaner and fresher water if used correctly. This replacement filter, ULTRAWF should be changed every 6 months. Change sooner if your home uses a lot of water. The ULTRAWF is a fantastic water filtration option. DiscountFilters.com guarantees your satisfaction with this product.