Duct Access Door, Door Height 16 in, Door Shape Rectangular, Door Thickness 1/2 in, Door Width 20 in, Fire Rating Not Rated, For Nominal Duct Diameter Not Applicable, Hinge Style None, Insulation Material Not Applicable, Latch Type Thumbscrews, Material Thickness 11 ga, Maximum Temperature Rating 2,300 Degrees F, Mounting Stud Length 1 1/2 in, Number of Mounting Stud 2, Observation Port Height Not Applicable, Observation Port Material Steel, Observation Port Width Not Applicable