Guardian Pool Spa Filter Replaces Pleatco PWWPC125B Unicel C-8413 Filbur FC-2575 Pentair Sta-Rite 5230-0125S Replaces Pleatco: PWWPC125B | Unicel: C-8413 | Filbur: FC-2575 Diameter 8-15/16'' Length 28-1/4'' Ends- 4" open hole