Linear Pneumatic Actuator Operating PSI Range 0 to 20 Max Air Pressure 30 psi Stroke 3 in Nominal Spring Range 8 to 13 psi Mounting Type Pivot Net Force Exerted @ 18 PSI 150 lb Length 12 in Width 6 in Height 8 in Provides Gradual or Positive Actuation of Medium to Large Dampers For Use With Medium to Large Dampers Includes Mounting Bracket and Pilot Positioner