The Culligan D-20A is a drinking water replacement cartridge. The replacement cartridge fits model US-600A. The cartridge is for point of use under sink applications. The filter is not for point of entry whole house applications. The cartridge life is up to 12 months or 1,000 gallons. Cartridge change reminder sticker included.
Granular activated carbon cartridge
Level 1 basic filtration
Reduces bad taste & odor, aesthetic chlorine taste & odor and sediment