GE Smartwater Slim Refrigerator Water Filter (3 Pack) - GSWF3PKProduct Description For best filtration results filter cartridge should be replaced every six months or 300 gallons Reduces chlorine taste and odor, particulates, cysts, lead and other contaminants. For best filtration results filter cartridge should be replaced every six months or 300 gallons. Designed and engineered specifically for use in select GE top freezer and bottom freezer refrigerators. Simple design provides easy, tool free, no mess filter