Economy Copper Plated 10mm Switched Lampholder 
10mm threaded entry on base to fix to light fitting.
This lampholder comes with an external earth connection.
It also has a shade ring to hold a lamp shade with a 30mm diameter hole.
Please Note: There may be some marks or blemishes on the copper plating this can be removed with any metal polish like brasso.
Diameter inc Shade ring: 32.5mm