SmartSpa C4950-6 Pool & Spa Filter Get more efficient filtration and better water clarify with SmartSpa filters Longer time between cleanings Diameter: 4 15/16-inch; length: 13 5/16-inch Top end cap: open, 2-1/8-inch inner diameter; bottom end cap: open, 2-1/8-inch inner diameter Pleat count: 212; filter media: 3-ounce reemay 2033; filter area: 50 square feet