WPCFF975, FM-BB-10-20, ECP20-BB, W20CPHD, FXHSC AND WHKF-WHPLBB Alternative 20 Micron Water Filter Replacement Cartridge Qty(4) and O-Ring Qty(1) by KleenWater Four cartridge and one o-ring value set 20 Micron Sediment Rating with 20 gallon per minute flow rate Compatible with wide body & "Big Blue" housings Pleated polypropylene construction 4.5" X 9.75" dirt/sediment filter cartridge