62 1/2" OD 12"H Roof Curb

Roof Curb Fixed, Nonventilated, Construction: 18" Gauge Galvanized Steel, For Use with: Flat Roofs Only,Damper Size: 50" X 50", (Damper Tray Included) Flashing Flange and Mounting Flange Surface:
2", Use with Dayton Ventilators Having A 64" Square Base, This Nonventilated Roof Curb Is Prefabricated, Leakproof and Provides Compatibility Between Ventilator, Curb, and Roof Opening On Commercial and Industrial Buildings. Ideal for Flat Roof Decks With Up to 6" of Insulation.
Dims:Curb Square OD: 62-1/2", Curb Height: 12", Curb Square Id: 59-1/2",Weight:220 Lbs, In Bulk, Made in USA.