???Description?? ?? High-quality materials: This MWF refrigerator filter is specially designed with active source of coconut shell, which can remove peculiar smell, chlorine, strange metal smell, rust and dangerous heavy metals. ?? Efficient use: The high quality makes this refrigerator water filter provide you and your family with clean water and fresh water for up to 6 months or 300 gallons, depending on the amount of water you use in the refrigerator. ?? NSF certification: This MWF refrigerator water filter has passed the certification of NSF/ANSI drinking water treatment standards 42 and 53, so you can ensure that it meets the structure, safety and pollutant standards. .