Field Controls 5MG1 Gas Fired Furnace/Boiler Draft Control

Gas Fired Furnace/Boiler Draft Control; Type Draft Control, Double Acting; Used On Gas Fired Furnace and Boiler; Overall Dimension 5-9/16 Inch Outer Diameter; Control Size 5 Inch; Nominal Capacity 19.6 Square Inch; Circumference 12-1/2 to 15-3/4 Inch; Material Thickness 24 Gauge (Ring/Gate), 26 Gauge (Collar); Approval UL (Canada and US), CSA