The Culligan filter is a level 1 drinking water filter that connects to the back of the refrigerator. It features granular activated carbon, which reduces unpleasant chlorine taste and odor resulting in cleaner, fresher-tasting water for ice cubes and beverages. Features include easy installation, compact design, and filter life of 12 months 2500 gallon. Package includes: Disposable filter, cartridge change reminder sticker.