Field Controls 4MG1 4″ Draft Regulator Double Acting For Gas

Description Gas Fired Furnace / Boiler Draft Control Type Draft Control, Double Acting Used On Gas Fired Furnace and Boiler Overall Dimension 4-9/16 Inch Outer Diameter Control Size 4 Inch Nominal Capacity 12.6 Square Inch Circumference 9-1/2 to 12-1/2 Inch Material Thickness 24 Gauge (Ring / Gate), 25 Gauge (Collar) Approval UL (Canada and US), CSA Resources:FLDCONE00022_31.pdfFLDCONINST00014.pdf