Pneumatic Damper Actuator Operating PSI Range 0 to 20 Max Air Pressure 25 psi Stroke 3 in Nominal Spring Range 5 to 10 psi Mounting Type Pivot Net Force Exerted @ 0 PSI 34 Net Force Exerted @ 18 PSI 67 Length 11 in Width 3 7/8 in Height 3 7/8 in Provides Gradual or Positive Actuation of Medium Dampers For Use With Dampers Includes Universal Mounting Bracket