The Pure Source Ultra replacement filter uses 100% coconut shell carbon blocks selected from Sri Lanka which maximizes the filtration effect and removes impurities while retaining beneficial minerals. The material and structure of GF replacement water filter meet the NSF42 standard. It is compatible with Frigidaire ULTRAWF Pure Source Ultra 9999 469999 46-9999 A0094E28261 refrigerator water filters. Follow the instructions and install in minutes with no extra tools required. GLACIER FRESH is an independent brand. All trademarks remain the property of their respective owners and are used for compatibility information only.