Brand New Waterdrop Refrigerator Water Filter Tested by IAPMO against NSF/ANSI 42 standards, Waterdrop filter effectively reduces chlorine, taste & odor. With supreme coconut shell carbon block, it can also reduce heavy metals, sediment & rust. The high impurity reduction rate ensures that the water we give to you is clean & healthy. Enjoy refreshing taste by changing your filter every 6 months or 4400 gallons. Replacement for InSinkErator F-201R water filter cartridges, F-201 Filtration System.Replacement for Stainless Steel Tank Instant Hot Water Tank HWT-00, HOT100 Instant Hot Water Dispenser, H-HOT150C-SS HOT150 Instant Hot Water Dispenser System. After advanced upgrade, the model number is changed from WD-F-201R into WD-W10