| GD1 |
 |
Low Leakage, Steel Control, Parallel Blade Damper |
| GD2 |
 |
Low Leakage, Steel Control, Opposed Blade Damper |
| GD20 |
|
Steel Control, Parallel Blade Damper |
| GD21 |
|
Steel Control, Opposed Blade Damper |
| AF53 |
|
Steel Control, Round Damper |
| GC22 |
|
Steel Control, Round Damper |
| GD26 |
 |
Low Leakage, Steel Airfoil Control, Parallel Blade Damper |
| GD27 |
 |
Low Leakage, Steel Airfoil Control, Opposed Blade Damper |
| GD30 |
|
Steel Airfoil Control, Parallel Blade Damper |
| GD31 |
|
Steel Airfoil Control, Opposed Blade Damper |
| GD41 |
|
Steel Control, Parallel or Opposed Blade Damper |
| IBD1 |
|
Steel Control, Insulated Parallel Blade Damper |
| IBD2 |
|
Steel Control, Insulated Opposed Blade Damper |
