Unicel C-4325 (4 Pack) Spa Replacement Filter Cartridge， 25 sq. ft.<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 4 5/8-inch; length: 11 7/8-inch</li><li>Top end cap: open， 2-1/16-inch inner diameter; bottom end cap: open， 2-1/16-inch inner diameter</li><li>Pleat count: 138; filter media: 3-ounce reemay 2033; filter area: 25 square feet</li><li>Get more efficient filtration and better water clarity with Unicel filters</li><li>Pentair Pool Products (57010500)</li></ul></div><img src="http://ecx.images-amazon.com/images/I/4124BjtjvHL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41uk9kvekFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41usqZ4S4BL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41-MJOk%2BglL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41zEUtu-YFL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/51jZvq2FJ1L.jpg" noproxy>