Product name: E40F540porcelain lamp holder
1. Certificate: CE ROHS
2. Available size: E14. E17. E27. E40. E39, B22AND SO ON
3. Packing condition: CARTON
4; Material:
Ring: Iron plated copper/Full copper/Aluminium plated copper/
Contactor: Iron plated copper/Iron plated nickel/Full copper
Screw: Iron
5. Terminal: Aluminuim and zinc alloy / copper

Actual photos: