Waterdrop WD-G3-CF Filter, Replacement for WD-G3-W, WD-G3P600 and WD-G3P800-W Reverse Osmosis System, 6-Month Lifetime: WD G3 W, WD G3P600, WD G3P800 W : The 3 in 1 front filtration stages effectively reduce sand, rust, particulates, suspended substances, and other impurities. Delivers clean and pure water to you. : Applies the superior natural coconut shell activated carbon block with a smaller pore size, which largely absorbs residual chlorine odors and organic materials, improving water taste. The activated carbon block is made from natural coconut shells . Please