Culligan D-10A 2PK Carb Filtration Replacement Cartridge, 2 Count (Pack of 1), Gray
The D-10A Basic drinking water cartridge provides 3 months/ 250 gallons of refreshing drinking water by reducing chlorine, particulates and bad taste. The D-10A is compatible with the following systems, US-550, SY-2000, SY-2100 and US-600A.