Replacement Filter Cartridge for Upgrade to Predator 150 Outer Diameter (inches): 10.0625,Overall Length (inches): 31.125 Top Hole (inches): 6, Bottom Hole (inches): 6 Filtration Area: 168 Sq. Ft. Pleatco#:PAP175-4, Unicel#:C-9417, Filbur#: FC-0698