Butterfly Dampers For Nominal Duct Diameter 9 in Overall Length 13 in Product Type Butterfly Valve Weight 4.85 lb Maximum Pressure Rating 42 in wc Maximum Temperature Rating 225 Degrees F Material Thickness 22 ga Material Stainless Steel Minimum Pressure Rating 2 in wc Shape Round Inside Diameter 9 in Outlet Diameter 9 in Overall Height 9 in Overall Width 9 in Color Silver Connection Type Clamp Together For Media Type Dust Environment Type Dusty