Intermatic Grasslin Electromechanical Time Switch, Series: MIL72, 120 V AC, 21 A, 1 hp, 2 hp, 1 Pole, 1CO 1 Form C SPDT Contact Form, 15 min to 24 hr Time Setting, 24 hr Pulse, Screw Electrical Connections, NEMA 3R Enclosure, -40 to 185 deg F, DIN Rail/Flush Mounting, 2.83 in L x 2.06 in W x 4 in H Dimensions