The human body is nearly 80% water. We all strive to be healthy, and the first step in achieving good health is drinking clean pure water! The best and easiest way to do that is with a Culligan Drinking Water Filter! This D-10 5 micron water filter is the replacement cartridge for that system. The Culligan granular activated carbon drinking water filter cartridge reduces sediment, dirt, chlorine, bad taste and odor. It has a high surface area for maximum adsorption and has a filter life of up to 3 months or 250 gallons so you rarely have to think about it. We recommended this unit for both city and well water supplies. It also includes a handy change reminder sticker. This filter cartridge fits model numbers US 600, US 550, and CTR 210.