Aqua Kleen AK-4005 Unicel Replacement Filter Cartridge for Swimming Pool and Spa<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>50 sq. ft.， 5 3/16" OD， Closed Top， Open Hole: 1 5/8" Bottom， 14 1/8" Long， AK-4005</li><li>Exact Fit for Unicel: C-5346</li><li>Exact Fit for Pleatco: PPM50TC</li><li>Exact Fit for Filbur: FC-3638</li><li>Guaranteed Perfect Fit - Extremely Durable - Wash &amp; Reuse - Most Energy Efficient - Withstands High Pressures &amp; Temperatures</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41exuc-59FL.jpg" noproxy>