Waterdrop WD-G2-W Replacement Filter 2-Year Combo, Pack of 2 WD-G2CF Filters and 1 WD-G2MRO Filter, Reduce PFAS Premium. Material: The G2CF filter uses a superior natural activated carbon block and a sediment PP membrane with a small aperture, efficiently reducing chlorine, taste and odor, and organics. The 2-in-1 front filtration stage effectively reduces sand, rust, particulates, suspended solids, and other impurities, providing you with clean and pure water.Compatible Model: Waterdrop WD-G2-B, WD-G2-W, WD-G2MNR-W Reverse Osmosis Water Filter. Optimum replacement cycle: In order to maintain your system in its top performance, it is recommended to replace the CF every 12 months, and replace the MRO every 24 months. This will ensure you have crystal clear, high-quality and great tasting water.