The Culligan/Pentek RWC-5 Water Filter Cartridge is a dual-purpose filter cartridge designed for standard housings including American Plumber, Filterite, Parker Hannifin, US Filter, CUNO, Fulflo, Keystone, US Water, Water Resources, and Pentek Water Filter Housings, The Culligan/Pentek RWC-5 is recommended for point of use water filtration, The RWC5"s unique outer wrap gives it a high capacity for capturing dirt and sediment while the inside medium is granular activated carbon for reducing chlorine taste and odor, The American Plumber/Pentek/Culligan RWC-5 string wound carbon water filter reduces chlorine taste and odor, sediment, and bad taste and odor, The Culligan/Pentek/American Plumber RWC-5 filter needs to be replaced every 4 months or 350 Gallons depending on water usage and water quality, Dimensions: 9-3/4"" L x 2-7/8"" W, SKU: CWD132