Pentair U9-46 6-1/2-Inch O-Ring Replacement Sta-Rite Commercial Pool and Spa Pump O-ring replacement Fits Pentair CF6 series commercial pool and spa pumps Also fits Pentair Sta-Rite Cast Iron, Bronze Suction Trap Assembly Commercial pool and spa pumps Measures 6-1/2-inch length by 1/4-inch height by 6-1/2-inch width