Blast Gate For Nominal Duct Diameter 4 in Body Material Grade 304 Body Material Stainless Steel Overall Length 7 1/2 in Product Type Manual Blast Gate Weight 3.85 lb Maximum Pressure Rating Not Applicable Blade Material Stainless Steel Maximum Temperature Rating 600 Degrees F Nameplate Voltage Not Applicable Seal Material Not Applicable Minimum Operating Pressure Not Applicable Minimum Pressure Rating Not Applicable Overall Depth 4 1/8 in Overall Width 16 in