Item:AX-2EF Replacement Water Filter Cartridge;Certificate:IAPMO; NSF/ANSI42 and NSF372; EC1935/2004; ISO9001;Use:refrigerator water filtration;Compatiable Code:AX-2EF;Filter Life:6 Months or 300 Gallons, depends on water quality;Flow Rating:0.5-1gpm/1.9