1. Product: Double Cylinder                    
2. Dimension(mm):                    
A:  60  62  63  68  70  80  90  100    
B:  30  31  31.5  34  35  40  45  50    
C:  30  31  31.5  34  35  40  45  50    
3. Key slot: Plane slot (computer slot)                    
4. Lock Core: Completely copper                    
5. Key Material: Copper/iron/plastic handle                    
6. Surface coating: Nickelizing/chromeplate/antique copper/gold dust and so on.              
7. Packing: One piece/white carton and one dozen/white carton                    
8. Quarantee period: 3-5 years                    
9. OEM and special requirement from customers are acceptable.