Pentair 24751-0006 O-Ring Replacement Sta-Rite Pool and Spa Filter O-ring replacement Fits Pentair Sta-Rite DEPB vertical pool and spa D.E. filter Also fits Pentair Sta-Rite HRPB high-rate pool and spa sand filter model HRPB24 Measures 6-inch length by 6-inch height by 6-inch width