Remove 90% or more of fluoride as well as other contaminates from your water with our four stage countertop water filtration system. These systems are easy to install; just hook it to your faucet (does not work with faucets with pull out sprayers). We use Brimac bone char as a filtration media with an NSF61 certification. Bone char is the very best fluoride option available and also removes a host of other pollutants. With the four stage you get three bone char filters, one carbon block and the housings for each. Remove fluoride, heavy metals, pesticides, chlorine and much more. You get 2 two stage systems that can be hooked together with 18" of tubing (provided) in order to place the system the way you want for your counter. Each section has the following dimensions: Length: 10in, Depth: 5 in, Height: 13 in. Note: If the sediment turbidity of your water is high from old pipes or frequent line breaks, we recommend a sediment pre-filter to keep your three stage system from clogging with debris. See our other listings for countertop and four stage options.