Remington” 100 percent coconut-activated carbon block filters offer high hardness and adsorptive capacity, low dust level and low ash and impurity properties. Independently tested and verified to comply with NSF chlorine reduction Class 1 requirements. These units provide particulate filtration and dirt-holding capacity of a five-micron sediment filter, simultaneously removing free chlorine and organic chemicals.www.ceramicfilters.netsales@ceramicfilters.net