Unicel C-9407 Replacement Filter Cartridge for 75 Square Foot Predator， Clean and Clear， Cal Spas<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 10 1/16-inch; length: 16 1/8-inch</li><li>Top end cap: open， 6 0/0-inch inner diameter; bottom end cap: open， 6 0/0-inch inner diameter</li><li>Pleat count: 171; filter media: 4-ounce reemay 2040; 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/418L4vKve3L.jpg" noproxy>