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Constructed of a 24 gauge galvanized steel double panel door and frame with mill finish for long lasting durability. 1/8" thick x 1/2"W closed cell neoprene gasketing between insulated door and frame assures tight seal without obstruction in air system. Frame includes 5/8" notched knock over tabs. Door panel filled with 2" fiberglass insulation compressed into 1" and includes aluminum continuous piano hinge. 18" W x 18" H outside flange dimensions. 16-3/4" W x 5/8" D x 16-3/4" H return flange dimensions. Color finish is Silver. Number of latches is 2.

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Hinged Duct Access Door - 18 x 18