Pneumatic Damper Actuator, Medium Actuator Force, 5-10 PSI Spring Range, 4" 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 Fixed External Mounting Bracket