8" x 8" Hinged Duct Access Door Rough Opening Size: 8" wide x 8 &frac78;" high Material: 24 gauge galvanized steel, double panel, Finish: Galvanized Steel Lock / latch: Self tightening, hand operated cam latch Hinge: Continuous aluminum piano hinge Flange: 24 gauge galvanized steel with 5/8" notched knock over tabs