This Master Flow 12 in. x 8 in. Rectangular Duct Cap is designed to terminate or block off a rectangular stack duct run in HVAC systems. It is constructed from durable 30-gauge galvanized steel to ensure strength, rust resistance, and long-lasting durability. It features a maximum temperature rating of 390 degrees Fahrenheit and is suitable for most residential HVAC applications. The cap can be securely installed using standard sheet metal screws (sold separately). This item is in used, fair condition

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