This Master Flow 6-inch Inline Damper is designed to balance and regulate airflow within round HVAC ductwork. Constructed from durable 30-gauge galvanized steel, it features a manual adjustment handle with a wing nut to lock the damper blade in the desired position. This model is specifically engineered for easy installation into existing runs of 6-inch pipe, making it ideal for both residential and commercial heating, venting, and air conditioning systems. Please note that it is designed for airflow regulation and not as a complete airtight shut-off valve or for use in high-heat flue systems

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