Pleatco PWWEK150-M4 Replacement Cartridge for Waterway Eco-Kleer 150， 1 Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement filter cartridge for pool and spa cleaning systems</li><li>50 Percent open ABS free flow cores maximize water flow through reemay filter media</li><li>Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span</li><li>Replaces unicel and filbur; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea</li><li>Measures 10-inches in diameter by 23-1/8-inches in length and 6-inches of top and bottom hole diameters</li></ul></div><img src="http://ecx.images-amazon.com/images/I/414MxOLewVL.jpg" noproxy>