AQUA BLUE Refrigerator Water Filter 3 Replacement | Advanced Filtration Technology (2pack) High grade carbon block, that removes over 99 percent of numerous potentially harmful contaminants which may be present in your water. Precision design makes our filter a perfect alternative to the original without water leaks, and quite easy to install requiring no tools. High grade carbon block, that removes over 99 percent of numerous potentially harmful contaminants which may be present in your water. Six-month filter life: For best filtration results, filter cartridge should be replaced every six months or 300 gallons Use activated carbon to reduces chlorine taste, odor, sediment, dirt, rust, turbidity, heavy metals and harmful sediments. At the same time, does not remove beneficial minerals.