Blast Gate For Nominal Duct Diameter 16 in Body Material Steel Overall Length 5 in Product Type Manual Blast Gate Weight 21.5 lb Maximum Pressure Rating 42 in wc Blade Material Galvanized Steel Maximum Temperature Rating 250 Degrees F Body Material Thickness 20 ga Overall Depth 5 in Overall Width 18 in Shape Rectangular Inside Diameter 16 in Color Silver Connection Type Clamp Together