Pneumatic Damper Actuator, High Actuator Force, Spring Return, 3 1/2" Stroke, 5-95% RH Humidity Range, 25 PSI Maximum Operating Pressure, 5/32" Push on Barb For Pilot, 1/4" Push on Barb for Main, 10 PSI Positive Positioner Span ( 5 PSI Spring included ), -20-158 Degree Temperature Range, Includes Internal Normally Open Trunnion Mounting Bracket with Pushrod