Unicel C-7466 Replacement Filter Cartridge for 65 Square Foot Sundance Spas<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 7 1/2-inch; length: 14 3/4-inch</li><li>Top end cap: castle， 0-inch inner diameter; bottom end cap: open， 2 5/8-inch inner diameter</li><li>Pleat count: 164; filter media: 3-ounce reemay 2033; filter area: 65 square feet</li><li>Get more efficient filtration and better water clarity with Unicel filters</li><li>Longer time between cleanings; meets oem specifications</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41vx6HfqaRL.jpg" noproxy>