The Opal water filter is designed for the GE Profile Opal Nugget Ice Maker to provide fresh-tasting ice every time. The Opal Nugget Ice Maker does not ship with a water filter, though this one is available as an accessory. With a 3-month life span, the water filter is tested against ANSI/NSF Standard 42 for the reduction of chlorine, tastes and odors. Easy do-it-yourself installation. This water filter is only compatible with Opal Nugget Ice Maker.