Pack of 6 AMERICAN PLUMBER 20 micron WHOLE HOUSE REPLACEMENT FILTER CARTRIDGES Recommended for chlorinated water supplies 4 month filter life, 16000 gallon capacity depending on usage and water conditions 20 micron nominal Reduces sand dirt silt FLOW RATE: 12GPM 9.75" TALL x 2.5" Diameter FITS AMERICAN PLUMBER W34-PR, WC34-PR, WVC34 Also works in Brands Ace, Aqua-Pure, Culligan, Cuno, Filterite, Keystone, OmniFilter, Pentek, Sears, Watts