Pneumatic Damper Actuator, Medium Actuator Force, 2.5-6.5 PSI Spring Range, 3" Stroke, Spring Return, 29 PSI Maximum Operating Pressure, 6.6 Square Inch Diaphragm, Dual Barbed Fitting for 5/32" or 1/4" OD Tubing Air Connection, -28-160 Degree Temperature Range, 5-95% RH Humidity Range, Includes External Trunnion Mounting Bracket