3M Purification System Model No. CFS8112 (5581705) Series 8000 SQC Replacement Cartridge, sanitary quick change design, 1 micron, 1.5 gpm flow rate, 10,000 gallons capacity, graded density filtration with activated carbon for sediment, chlorine taste/odor reduction, NSF (priced per each, packed 12 each per case)