Pleatco PHC25 Replacement Cartridge for 4 5/8 X 6 3/4, TSC, Top Load, 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 6-5/8-by-1-7/8-inches with handle Made in the USA