Pleatco PHC25P4 Top Load Cartridge/Grid Replacement for 4 5/8 X 6 3/4 TSC Pleatco Cartridge Filter replacement Cartridge/Grid 4 5/8 X 6 3/4, TSC, Top Load Unicel: 4CH-20; FILBUR: FC-0125; Mfg.No.:20241-238, PVT-25