Sandwich Style Insulated Round Access Door, Rectangular, Door Width 9 in, Door Height 4 3/4 in, Duct Diameter 5 in to 6 in, Material Steel, Finish Galvanized, Rough Opening Width 7 7/8 in, Rough Opening Height 3 7/8 in, Temp. Range 200 Degrees F max, Hinges None, Standards SMACNA, Includes Insulated
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