4FC-LS Water Filter Cartridge, 4FC-LS, (1) 4FC-LS Fibredyne® II submicron carbon block cartridge, reduces lead, cysts, chlorine, taste & odors, inhibits bacterial growth & scale, 4,900 gallons lead removal, 9,800 gallons taste & odor, 1.8 gpm, 0.5 micron, NSF 42 & 53 (EV969316)