Duct Access Door Door Height 8 in Door Shape Square Door Thickness 1 3/4 in Door Width 8 in Fire Rating Not Rated For Nominal Duct Diameter Not Applicable Hinge Style Tab-In Insulation Material Fiberglass Latch Type Single Cam Material Thickness 24 ga Maximum Temperature Rating Not Applicable Mounting Stud Length Not Applicable Number of Mounting Stud Not Applicable Observation Port Height 8 in Observation Port Material Steel Observation Port Width 8 in