This is a Pentair 355021S 3/4 HP 1-Speed 1-Phase Black Square Flange Motor, 115/208-230V, 1 A, 60 Hz. This motor is used in Pentair Max-E-Pro and Sta-Rite SuperMax pool pumps.
Pentair replacement motors have been carefully engineered to meet the rugged demands of the pool and spa industry. Two sealed ball bearings (with large 304 bearing on shaft end) offer ample capacity for extended life. Bearings are selected for quietness and are lubricated for life with greases specifically chosen for moisture and heat resistant qualities. Aluminum end frames are accurately machined for maximum concentricity and minimum runout.