- Sizes 12 inch through 20 inch spring bearing with and wing nut both side
- Handle on one side
- 1/4 inch regulators
Damper, B, Nominal Size: 12 inch, Steel, Galvanized Finish, Standards: ASTM-A653, 26 GA Gauge
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Type: B
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Nominal Size: 12 inch
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Material: Steel
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Finish: Galvanized
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Gauge: 26 ga