NAILOR INDUSTRIES Radial Sliding Blade Dampers are designed for fine volume control in round neck diffuser applications. Featuring heavy-gauge, corrosion-resistant steel construction, these neck-mounted dampers effectively slide at right angles to the duct, making them ideal for flexible duct applications. Equipped with steel barb clips for secure attachment, the gang-operated radial blades offer precise adjustments via a screwdriver operator slot. Perfect for enhancing airflow management and durability in HVAC systems.