Unicel 7CH-552 Replacement Filter Cartridge for 52 Square Foot Top Load， Dimension One Spas<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 7-inch; length: 10 1/2-inch</li><li>Top end cap: semi-circular handle， 0-inch inner diameter; bottom end cap: 2-inch male thread/mpt， 0-inch inner diameter</li><li>Pleat count: 216; filter media: 3-ounce reemay 2033; filter area: 52 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/41un8DoM66L.jpg" noproxy>