This replacement refrigerator water filter uses the F-Type locking mechanism and is a direct replacement for filter model references HAFIN1/EXP. It is tested and certified by NSF International against NSF/ANSI International Water Quality Safety Standard 42 for chlorine reduction, taste, and odor improvement. The filter reduces chlorine taste and odor, sediment, rust, lead, asbestos, and more, ensuring your refrigerator continues to operate with maximum performance and efficiency. It is easy to fit. Specifications: Flow rate 1.9 lpm/0.5gpm, Max. operating temperature 38°C/100°F, Max. working pressure 862 kPa/125 psi, Min. operating temperature 0.6°C/33°F, Min. working pressure 138 kPa/20 psi.