Pleatco PAP150-M4 Replacement Cartridge for Predator 150 - Pentair Clean and Clear 150 (MICROBAN), 1 Cartridge Replacement filter for pool and spa cleaning systems 50% open ABS free flow cores maximize water flow through REEMAY filter media; Microban inhibits the growth of stain and odor causing microbes like bacteria and algea Antimicrobial end caps resist chlorine degradation and provide support to filter material for a longer life span 31-1/8-by-6-by-6-inches Made in the USA