GE GSWF Refrigerator Water Filter, 1-Pack GE guaranteed fit: Designed and engineered specifically for use in select GE top-freezer and bottom-freezer refrigerators Premium filtration: Certified to reduce particulates, chlorine-resistant cysts, lead and 5 other contaminants Twist and lock design: Simple design provides easy, tool-free, no-mess filter replacement Six-month filter life: For best filtration results, filter cartridge should be replaced every six months* or 300 gallons *Replace sooner if flow rate noticeably declines