OES1572 Features: * Cartridge * Increases clarity of your entire home"s water by reducing sediment, which extends the life of appliances that process water * Filters up to 15,000 gallons * Improved taste from spun-wound polypropylene and carbon filtration phases * Lasts up to 3 months * Sold in package of two Includes: * Includes two universal 10" cartridge that fit most other brands of standard-size systems Construction: * Carbon Wrapped Polypropylene construction