Round-Oval, Engine, Round, 8 1/4 in Outside Dia - Bottom, a DAYTON Class 2 Transformer: 40 VA Power Rating, 120V AC/208V AC/240V AC, 24V AC and a WIEGMANN Wireway Bracket Hanger: 4 in Wd, 4 in Ht, 16 ga Gauge, 1, Without Knockouts, Steel