Blast Gate, For Nominal Duct Diameter 8 in, Body Material Steel, Overall Length 20 in, Product Type Pneumatic Blast Gate, Weight 14 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 6 1/8 in, Overall Width 10 7/8 in