Blast Gate For Nominal Duct Diameter 12 in Body Material Cast Aluminum Overall Length 16 3/8 in Product Type Pneumatic Blast Gate Weight 11.6 lb Maximum Pressure Rating 2 434 in wc Blade Material Galvanized Steel Maximum Temperature Rating 300 Degrees F Nameplate Voltage 110/120V AC Number of Air Cylinders 2 Seal Material Not Applicable Maximum Operating Pressure -30 in wc Minimum Operating Pressure Not Applicable Minimum Pressure Rating 80 psi Overall Depth 4 in