The DSB-123SD enables architects and institutions to bring maximum security to areas where access is required for repair or maintenance purposes.
| Door Size H × W (in.) | Door Size H × W (mm) | Wall/Ceiling Opening H × W (in.) | Shipping Wt. (lbs.) | Shipping Wt. (kg.) |
| 12 × 12 | 305 × 305 | 12 1/2 × 12 1/2 | 35 | 15.9 |
| 16 × 16 | 406 × 406 | 16 1/2 × 16 1/2 | 44 | 20 |
| 18 × 18 | 457 × 457 | 18 1/2 × 18 1/2 | 49 | 22.3 |
| 24 × 24 | 610 × 610 | 24 1/2 × 24 1/2 | 65 | 29.5 |
| 36 × 24 | 914 × 610 | 36 1/2 × 24 1/2 | 80 | 36.4 |
| 36 × 36 | 914 × 914 | 36 1/2 × 36 1/2 | 115 | 52.3 |