Universal slim design installs quickly and easily to replace cartridge of Culligan undersink filter No US-550 and US-600. Also fits Culligan No US-560, US-560K, CTR-210 and SY-5167. High surface area with activated carbon granules to provide clean, fresh drinking and cooking water by reducing unpleasant tastes and odors and chlorine taste and odor. Up to 12-month/1,000 gal life. NSF International tested and certified.