Unicel C-6960 Replacement Filter Cartridge for 15 Square Foot Quad De 60 Diameter: 6 1/4-inch; length: 20 3/4-inch Top end cap: open with molded gasket, 3 0/0-inch inner diameter; bottom end cap: open with molded gasket, 3 0/0-inch inner diameter Pleat count: 42; filter media: 8-ounce de; filter area: 15 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications