Field Controls 6MG1 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 6-5/8 Inch Outer Diameter; Control Size 6 Inch; Nominal Capacity 28.3 Square Inch; Circumference 15-3/4 to 19 Inch; Material Thickness 24 Gauge (Ring/Gate), 26 Gauge (Collar); Approval UL (Canada and US), CSA