Unicel C-7430 Replacement Filter Cartridge for 110 Square Foot Tc330 Jacuzzi, Cantar, Competition Tri-clops Replacement, Round Diameter: 7 13/16-inch; length: 22 13/16-inch Top end cap: closed, 0-inch inner diameter; bottom end cap: open, 4-1/16-inch inner diameter Pleat count: 193; filter media: 4-ounce reemay 2040; filter area: 110 square feet Get more efficient filtration and better water clarity with Unicel filters Longer time between cleanings; meets oem specifications