The CFB-Plus Series cartridges are an enhanced version of our CFB product. It offers the same benefits with even greater chlorine taste & odour reduction and the highest sediment reduction found in a carbon cartridge.CFB-Plus Series products are modified moulded blocks manufactured using Pentek proprietary Fibredyne technology. This technology creates a unique filter media by attaching powdered activated carbon onto a cellulose-free synthetic fibre matrix. The result is a single cartridge that combines the benefits of both a sediment filter and a carbon block into a single cartridge.Fibredyne's carbon block technology also offers up to two times the chlorine taste & odor reduction and dirt-holding capacity of traditional blocks (based on manufacturers internal testing). In addition, this technology will not release fines into the effluent stream due to a unique post-filtration layer that is fused to the carbon/fiber media blend.CFB-Plus Series cartridges are manufactured entirely from FDA-compliant materials, making them an ideal choice for a wide range of residential, food service, commercial and industrial applications.Tested and Certified by NSF International to NSF/ANSI Standard 42 for materials requirements only.