Unicel C-6660 Replacement Filter Cartridge for 60 Square Foot Jacuzzi CF-60 Diameter: 6 15/16-inch; length: 29 3/8-inch Top end cap: open, 3-1/2-inch inner diameter; bottom end cap: open, 3-1/2-inch inner diameter Pleat count: 88; filter media: 6-ounce reemay 2470; filter area: 60 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications