Duct Access Door, Door Height 15 in, Door Shape Square, Door Width 15 in, Latch Type Thumbscrews, Material Thickness 16 ga, Maximum Temperature Rating 2,300 Degrees F, Mounting Stud Length 1 in, Number of Mounting Stud 8, Observation Port Material Steel, Rough Opening Height 12 in, Rough Opening Width 12 in, Standards UL Listed, Product Type Access Door, For Media Type Grease