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System available in a variety of wall widths – easily installed in poured concrete or concrete block walls without modification Welded frame for maximum structural strength and rigidity Vent opens and closes with ease, allowing ventilation in any season Insert constructed aluminum with aluminum screen
Available in a variety of wall widths.Easily installed in poured concrete or concrete block walls without modification.Welded frame for maximum structural strength and rigidity.Vent opens and closes with ease, allowing ventilation in any season.Steel main frame is finished with either a durable gray gloss or galvanized.
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