Unicel C-8416 Replacement Filter Cartridge for 150 Square Foot Sta-rite PXC-150, Waterway Pro Clean 150 Diameter: 8 15/16-inch; length: 28 3/16-inch Top end cap: open with molded gasket, 4 0/0-inch inner diameter; bottom end cap: open with molded gasket, 4 0/0-inch inner diameter Pleat count: 177; filter media: 4-ounce reemay 2040; filter area: 150 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications