Crystala Filters XWF Water Filter, Compatible with GE XWF Refrigerator Water Filter, 4PackBrand: Crystala Filters Color: White Features: Crystala Filters CF9 Filter Statement: The materials and construction are in compliance with the NSF42 standard. CF9 GE refrigerator water filter reduces Chlorine and improve taste odor. Find NSF 42 Standard information: Go to NSFs database, enter certified model number "CF9" or manufacturer "Ningbo Pureza Technology, LLC". If you find that the product is not NSF42 certified, you can claims identified in