Pleatco PA50SV Replacement Cartridge for Hayward SwimClear C2020, C2025, Super-Star-Clear C2000, Sta-Rite PRC 50, 1 Cartridge Replacement filter for pool and spa cleaning systems 50% 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 14-3/16-by-3-by-3-inches Made in the USA