Pentair C1-200PA Diffuser Replacement Sta-Rite Max-E-Glas/Dura-Glas series Inground Pool and Spa Pump Diffuser replacement Fits Pentair Sta-Rite 2-1/2-horsepower Max-E-Glas/Dura-Glas series inground pool and spa pumps Measures 6-1/2-inch length by 6-1/2-inch width by 1-3/4-inch height