Unicel C-7375 Replacement Filter Cartridge for 75 Square Foot Caldara Spa， New Style<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 7-inch; length: 14 3/4-inch</li><li>Top end cap: semi-circular handle， 0-inch inner diameter; bottom end cap: open， 2 11/16-inch inner diameter</li><li>Pleat count: 216; filter media: 3-ounce reemay 2033; filter area: 75 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/41RYTI1wxjL.jpg" noproxy>