Pleatco PA126-PAK4 Replacement Cartridge for Hayward Super-Star-Clear C5000 SwimClear C5020, Pack of 4 Cartridges 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 32-7/8-by-3-by-3-inches Made in the USA