Our replacement filter cartridges for Aqua-Pure water filter AP-DW80/90 can reduce chlorine, taste and odor, which is tested by IAPMO against NSF/ANSI 42 Standard. After advanced upgrade, the model number is changed from WD-DW80/90 into WD-W60-80/90. Specially selected premium materials are lead-free, which is fully tested and certified by IAPMO against NSF/ANSI 372 standard. Perfect fit for the original system: This replacement filter is designed to fit with your original system, providing you with great water experience without worrying about water leakage. Stable flow rate: The fast yet stable water flow is another advantage for further filtration. Fits the following models: Aqua-Pure AP-DW80/90; AP-DWS1000; KOHLER K-202-NA Aquifer Premium; KOHLER K-201-NA Aquifer High-Flow, KOHLER K-200-NA, KOHLER K-20852-NA. Waterdrop DW80/90 Under Sink Water Filter, Replacement for Aqua-Pure AP-DW80/90, AP-DWS1000, Kohler K-201-NA, Kohler K-202-NA, NSF/ANSI 42&372, 2 Pack, Model No.WD-W60-80/90