C1-20 Pentek Replacement Filter CartridgeThe Pentek C1 20 Carbon Water Filter provides sediment filtration, plus unpleasant taste & odor reduction all in one convenient cartridge. The C1 20 filter cartridges have high dirt holding capacity. They offer an economical solution for all of your general purpose water filtration needs. Constructed of a carbon impregnated cellulose media, these dual purpose cartridges filter out fine particles, as well as unwanted taste and odor from your tap water.