Duct Collar w/Damper, For Nominal Duct Diameter 5 in, Material Steel, Overall Length 5 in, Material Thickness 24 ga, Weight 2 lb, Maximum Pressure Rating 3 in wc, For Duct Height 6 in, Shape Round, End Type Crimped, For Duct Width 5 in, Gas Appliance Category Not Applicable, Inlet Diameter 5 in, Damper Type Low Leakage, Inside Diameter 5 in, Flange Outside Diameter 1 in, Outside Diameter 5 in, Flange Inside Diameter 5 in, Color Silver, Outlet Diameter 5 in, Overall Height 6 in