4” Round HVAC Duct Damper – 30 Gauge Galvanized Steel Airflow Control Plate with Adjustable Locking Arms (for 4 inch Diameter Ducts) – Also Available in 4”, 6”, 8”, 10”, & 12” Sizes

This round HVAC duct damper provides a simple and effective way to control airflow throughout your ventilation system. Whether you’re fine-tuning comfort between rooms or limiting airflow to unused spaces, this damper allows for precise adjustment and dependable performance.Made from durable galvanized steel, it’s designed to withstand everyday HVAC conditions while resisting corrosion over time. The adjustable locking arms make it easy to set airflow exactly where you want it and keep it there.Available in 4”, 6”, 8”, 10”, and 12” sizes, this damper is suitable for a wide range of residential and commercial ductwork applications—making it a practical choice for contractors, installers, and DIY projects alike.Backed by nearly a century of expertise and a commitment to excellence, this adjustable duct damper stands as a beacon of stability and reliability in the ever-evolving HVAC industry.

• PRECISE AIRFLOW CONTROL: Easily regulate airflow in HVAC duct systems to balance room temperatures, reduce wasted energy, and improve overall system efficiency.
• DURABLE GALVANIZED STEEL: Constructed from corrosion-resistant 30ga galvanized steel for long-lasting performance in heating, cooling, and ventilation environments.
• SECURE ADJUSTABLE LOCKING ARMS: Features easy-to-use locking mechanisms that hold the damper firmly in place once adjusted—no drifting or re-positioning over time.
• MULTIPLE SIZE OPTIONS: Available in 4”, 6”, 8”, 10”, and 12” diameters to fit a wide range of round ductwork applications in residential and commercial systems.
• VERSATILE HVAC APPLICATION: Ideal for airflow balancing, zone control, and system tuning in homes, workshops, offices, and mechanical rooms.