Unicel C-7304 Replacement Filter Cartridge for 40 Square Foot Jacuzzi Ce Diameter: 7-inch; length: 13 11/16-inch Top end cap: open with step, 3 0/0-inch inner diameter; bottom end cap: open with step, 3 0/0-inch inner diameter Pleat count: 119; filter media: 3-ounce reemay 2033; filter area: 40 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications