Unicel C-7455 Replacement Filter Cartridge for 55 Square Foot Hayward Cx550re， Muskin P/N 58039， FE-127<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Diameter: 7-inch; length: 19 5/8-inch</li><li>Top end cap: open with molded gasket， 3 0/0-inch inner diameter; bottom end cap: open with molded gasket， 3 0/0-inch inner diameter</li><li>Pleat count: 105; filter media: 4-ounce reemay 2040; filter area: 55 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/41fS0so7fNL.jpg" noproxy>