Butterfly Dampers For Nominal Duct Diameter 7 in Overall Length 8 in Product Type Butterfly Valve Weight 3.2 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 7 in Outlet Diameter 7 in Overall Height 7 in Overall Width 7 in Color Silver Connection Type Clamp Together For Media Type Dust Environment Type Dusty Material Fabrication Rolled Edge