Dimensions: PIPE SIZE: 8 INCH DIAMETER
The 7 and 8 inch dampers shown below are mounted facing upward because gravity closes them and air pressure from the hood opens them. 8 INCH DAMPER OLD FASHONED RUGGED CONSTRUCTION FOR LONG LIFE. MOUNT BETWEEN TWO SECTIONS OF DUCT PIPE. IT CAN BE MOUNTED NEAR THE ROOF TO KEEP COLD AIR OUT OF THE ATTIC. ALL DAMPERS ARE IN STOCK AND SHIP THE SAME DAY OR NEXT DAY.