Sandwich Style High Temp Round Duct

Duct Access Door, Door Height 4 in, Door Shape Rectangular, Door Thickness 1 1/8 in, Door Width 8 in, Fire Rating Not Rated, For Nominal Duct Diameter 7 in, 8 in, 9 in, Hinge Style None, Insulation Material Not Applicable, Latch Type Thumbscrews, Material Thickness 22 ga, Maximum Temperature Rating 2,300 Degrees F, Mounting Stud Length 2 in, Number of Mounting Stud 2, Observation Port Height Not Applicable, Observation Port Material Steel, Observation Port Width Not Applicable