Pleatco PRB8.5-M Replacement Cartridge for Rainbow Chloro (MICROBAN)， 1 Cartridge<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Replacement cartridge for rainbow chloro</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 C-2303 and filbur FC-2324; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea</li><li>Measures 2-7/8-inches in diameter by 17-1/16-inches in length and 2-1/8-inches of top and bottom hole diameters</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31TWbLeEkjL.jpg" noproxy>