1. Product: Double Cylinder                    
2. Dimension(mm):                    
A:  54  57  60              
B:  27  27.5  30              
C:  27  27.5  30              
3. Key slot: "S" Style                    
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.