Aqua Kleen AK-60552 Unicel Replacement Filter Cartridge for Swimming Pool and Spa<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>100 sq. ft.， 7" OD， Open Hole: 3" Top， Open Hole: 3" Bottom， 29 7/16" Long， AK-60552</li><li>Exact Fit for Unicel: C-7698</li><li>Exact Fit for Filbur: FC-1291</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/31irwj10ztL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41BbrHs1JLL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/414eSkzAiaL.jpg" noproxy>