Pleatco PWWPC125B-M Replacement for Waterway Proclear 125-Square-Foot 2006 and Prior, Sta Rite Posi Clear PXC-125 (MICROBAN), 1 Cartridge Replacement cartridge for 125-square-foot waterway proclear 50 Percent open ABS free flow cores maximize water flow through reemay filter media Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span Replaces unicel C-8413 and filbur FC-2575; made in usa; microban inhibits the growth of stain and odor causing microbes like bacteria and algea Measures 8-15/16-inches in diameter by 28-1/4-inches in length and 4-inches of top and bottom hole diameters