Pneumatic Damper Actuator Operating PSI Range 0 to 25 Max Air Pressure 25 psi Stroke 6 in Nominal Spring Range 8 to 13 psi Mounting Type Pivot Net Force Exerted @ 0 PSI 491 Net Force Exerted @ 18 PSI 1 835 Length 15 3/4 in Width 12 in Height 28 in Provides Gradual or Positive Actuation of large Dampers For Use With Dampers Includes Swivel Mount Bracket Clevis And Crank Arm