Guaranteed Fit - compatible with select GE Under Sink Filtration Systems, including GXK285JBL, GXK295JNN, GXSL55R, GXSV65R and GNSV70R, plus Pfister Clarify Lita filtration faucets Advanced Filter - Reduces lead, select pharmaceuticals, select VOCs, chlorine taste and odor and other impurities. Certified to NSF/ANSI 42, 53, and 401 - certified by IAPMO Six-month filter life - Filter should be replaced every six months for best filtration results Filters down to 0.5 microns - The lower the microns, the more contaminants are caught and reduced Under Sink Filtration - Filtered water where you need it most Double Pack - Includes two filter cartridges