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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
Finish
 Black
Sizes
 6" 8" 10" 12" 14" 16" 20" 24"
*Note: Not for use with flexible ducts.

Model BS Dimensions (PDF Version)

MODEL DUCT SIZE A B C
BS 6 6" 5 11/16 22/32 22/32
BS 8 8" 7 21/32 3/32 22/32
BS 10 10" 9 5/8 19/32 22/32
BS 12 12" 11 5/8 1 1/16 22/32
BS 14 14" 13 5/8 1 9/16 22/32
BS 16 16" 15 9/16 2 1/32 22/32
BS 20 20" 19 1/2 3 1/32 22/32
BS 24 24" 23 7/16 4 1/32 22/32
Dimensions are in inches. Product information is Subject to Change Without Notice

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