Model BS damper with multiple blades is designed for air volume control for round ducts. Continuously adjustable from the face with a screwdriver for quick and easy volume control just by twisting until the desired setting is reached. The multiple blades provide more precise control. All-steel construction for durability.
Material: Heavy-Gauge Steel
Sizes: 6" 8" 10" 12" 14" 16" 20" 24"
| Available for Standard Duct Sizes
| *Note: Not for use with flexible ducts.