Fast Acting Two Position Actuator, 120Vac, Two Position, SPST Control Signal, 175 Lb-In Torque, 2 Internal Auxiliary Switches, 15 Second Nominal Driving Time, 15 Second Maximum Spring Return, 95 ± 3 Degree Rotational Stroke, Nema 2 Rated, Manual Operation Crank, 3/8"-1.06" Round or 3/8-11/16" Square Damper Shaft, Self Centering Clamping Adapter, 5-95% RH Non Condensing Operating Humidity Range, -40-130 Degree Ambient Temperature Range