Pentek 4-5/8", Micron Block Cartridge, 0.5 x FloPlus-10BB 9-3/4" Carbon Filter

PREMIUM HIGH EFFICIENCY CARTRIDGES provide outstanding chlorine taste & odor reduction and very small particle removal to create cleaner, safer water FITS ALL 10" Big Blue housing and can replace any 10" x 4.5" heavy duty carbon filter cartridge HIGH FLOW RATES AND LOW PRESSURE DROP similar to a nominal 10 micron carbon block cartridge with the particulate efficiency of a 0.5 micron cartridge NSF INTERNATIONAL tested and certified for your peace of mind 25,000 GALLON CAPACITY. Replace every 6 months or when you notice a drop in water pressure or water quality