Square D Starter, Integral Horsepower Non-Reversing Type M, Series: 2510M, 600 V AC, 18 A, 5 hp Motor, 3 Pole, Manual Reset, 3 ph, Pressure Wire Clamp, Thermal Melting Alloy Overload Relay, Pushbutton Control, NEMA 1, Sheet Steel, 5 in W x 4.13 in D x 8.63 in H