Heavy gauge corrosion-resistant, grey, galvanized steel. Corrugated for extra strength and safety. Will not crack or sag. Unaffected by frost. Rolled top edges for safety and additional strength. Sizes to fit all standard basement windows. Size; 49"L X 12"D X 22"H
Manufacturer: CONQUEST STEEL Model Number: 491222 UPC: 870926001005
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