Aries (AF-10-2212-BB) 10" x 4.5" (2 lb) KDF-85-GAC FilterThe Aries AF 10 2212 BB combines 2 pounds of KDF 85 media with coconut shell GAC in a 10" x 4. 5" Big Blue cartridge specifically engineered for well water treatment where iron and hydrogen sulfide are present. Rated for 40,000 gallons at 2 gpm, this dual media filter addresses ferrous iron, rotten egg odor, chloramine, and taste issues in a single cartridge. SPECIFICATIONS Filter Performance Data Dimensions 10" x 4. 5" Big Blue format Media Weight 2