| Make | Bell Systems |
|---|---|
| Manufacturer | Bell System (Telephones) Limited |
| Model code | 204 |
| Electric Release Type | Mortice Release |
| Fail-Open/ Fail-Secure | Fail-Secure |
| Door Open Type | Inward / Outward door open type |
| Holding Force kN | 300kg |
| Electrical Specifications | Voltage: 12 |