Blast Gate, For Nominal Duct Diameter 4 in, Body Material Cast Aluminum, Overall Length 6 7/8 in, Product Type Manual Blast Gate, Weight 1 lb, Maximum Pressure Rating Not Applicable, Blade Material Galvanized Steel, Maximum Temperature Rating 300 Degrees F, Nameplate Voltage Not Applicable, Seal Material Not Applicable, Minimum Operating Pressure Not Applicable, Minimum Pressure Rating Not Applicable, Overall Depth 1 7/8 in, Overall Width 5 in, Standards Not Applicable, Inside Diameter 4 in