GE MWF SmartWater Compatible Water Filter Cartridge - Refrigerator Very easy to install with clear instructions. Costs less than GE without compromising quality or flow rate. Replaces GE MWF, GWF, GWFA, GWF01, GWF06, MWFA. Tastes great by leaving potentially healthy, beneficial minerals while removing chlorine, other chemicals and contaminants. Fully certified to NSF 42 standards (Material, Structure, and Performance) through WQA and NSF.