Blast Gate For Nominal Duct Diameter 12 in Body Material Steel Overall Length 5 1/4 in Product Type Pneumatic Blast Gate Weight 44 lb Maximum Pressure Rating 42 in wc Blade Material Galvanized Steel Maximum Temperature Rating 150 Degrees F Nameplate Voltage 120V AC Number of Air Cylinders 2 Body Material Thickness 20 ga Minimum Operating Pressure 75 psi Minimum Pressure Rating 75 psi Overall Depth 30 in Overall Width 16 in Shape Rectangular Inside Diameter 12 in Color Silver