Pneumatic Actuator Operating PSI Range 8 to 13 Max Air Pressure 30 psi Stroke 4 in Nominal Spring Range 8 to 13 psi Mounting Type Pivot Net Force Exerted @ 0 PSI 33 lb Net Force Exerted @ 18 PSI 55 lb Length 10 in Width 4 19/32 in Height 4 5/8 in Provides Modulating or Two Position Control For Use With Dampers or Air Valves Includes Clevis