Blast Gate For Nominal Duct Diameter 4 in Body Material Steel Overall Length 11 3/8 in Product Type Manual Blast Gate Weight 6.2 lb Maximum Pressure Rating Not Applicable Blade Material Galvanized Steel Maximum Temperature Rating 300 Degrees F Nameplate Voltage Not Applicable Number of Air Cylinders Not Applicable Seal Material Not Applicable Maximum Operating Pressure -30 in wc Minimum Operating Pressure Not Applicable Minimum Pressure Rating Not Applicable Overall Depth 5 7/8 in