Hubbell Wiring Device-Kellems, GFBFST20W, GFCI Receptacle, 1-Phase Blank Face Heavy Duty Standard Self Test Screw Mount, 125 V AC, 20 A, 1 hp, 60 Hz Frequency, 2 Pole, 3 Wires, 5-20R NEMA Rating, Commercial Grade, -30 to 150 deg F, Screw Terminal, Thermoplastic/Composite, White, 1.75 in W x 1.47 in D Dimensions