Pentair 357255 #357 Lid O-Ring Replacement Pool and Spa Inground Pump Lid o-ring replacement Fits Pentair SuperFlo inground pool and spa pump Also fits Pentair Sta-Rite SuperMax high pressure inground pool and spa pump Compatible with Pentair Sta-Rite OptiFlo aboveground pool and spa pumps Measures 6-inch length by 1/4-inch height by 6-inch width