Blast Gate For Nominal Duct Diameter 9 in Body Material Grade 304 Body Material Stainless Steel Overall Length 5 in Product Type Manual Blast Gate Weight 7 lb Maximum Pressure Rating 42 in wc Blade Material Galvanized Steel Maximum Temperature Rating 1 100 Degrees F Body Material Thickness 22 ga Overall Depth 5 1/2 in Overall Width 11 in Shape Rectangular Inside Diameter 9 in Color Silver Connection Type Clamp Together