VALVE/DAMPER ACTUATOR FLOATING CONTROL, 150 LB-IN TORQUE, 90 OR 160 DEG STROKE, 30 OR 60 SEC TIMING, 2 AUX SWITCH, 24 VAC, 50/60 HZ, DUAL SHAFT. REPLACES M644D1005 24V 50/60HZ 17VA 150LB-IN ADJ STROKE 90-160 DEG. 30-60 SEC FLOATING TWO AUX SWITCH