Pureline MWF Water Filter for GE® Refrigerator, Replacement for GE MWF, Smartwater MWFP, Kenmore 46-9991, Models MWFP, MWFINT, GWF, GWFA, Refrigerator Water Filter. NSF Certificate,Brand: PURELINE Color: White Features: Innovative Filtration Technology: Our refrigerator water filters use a state of the art 3 step filtration process consisting of 2 pore sized micron filters and an activated carbon block that enhances water quality and taste. Firstly, the water goes through a mechanical filter that captures medium size elements then passes through 2 ionization filters that filter out large materials and remove the smallest