Monitored Dual Filtration System Replacement Filter Cartridge Set, Chlorine, Bad Taste, Odor and Sediment Reduction, Granular Activated Carbon, High Surface Area For Maximum Absorption, Reduces MTBE, Pesticides, Herbicides and Chemicals, VOCS, In Combination With D-40, Taste and Odor/Chlorine/Desiment/Giardia and Cryptosporidium/Lead/VOCS/Asbestos, 99% Reduction Of Dissolved Lead, 91% Reduction Of Mercury, 99.95% Removal Of Disease Causing Giardia and Cryptosporidium Cysts, Asbestos, Chlorine, .5 Micron, Nominal, Filtration, CBC Activated Carbon Block With Lead Reduction Media, For Use With Model # SY-2300 and Model #SY-2650.