Unicel 7CH-90 Replacement Filter Cartridge for 90 Square Foot Sundance, 19-Inch with 1-1/2-Inch MPT Diameter: 7-inch; length: 19-inch Top end cap: open with beveled edge, 2-1/2-inch inner diameter; bottom end cap: 1-1/2-inch male thread/mpt, 0-inch inner diameter Pleat count: 182; filter media: 3-ounce reemay 2033; filter area: 90 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications