Dual filter cartridge replacement system set reduces MTBE, 99% dissolved lead, 91% mercury, pesticides, herbicides, and chemicals (VOCs), greater than 99.95% cryptosporidium and giardia, asbestos, chlorine, bad taste and odor, and sediment reduction. 0.5 micron (nominal) filtration. CBC activated carbon block with lead-reduction media. Filter life up to 6 months or 600 gallon. Use with model No. SY-2300, SY-2500, and SY-2650.