This ES Antique Plated Threaded Lampholder with cord grip comes complete with an internal earth connection. It is intended to have one or two shade rings fitted to hold the shade in place. This lampholder comes with the matching metal cord grip allready in installed.
If you want to do this yourself you will need to extend the Base on the lampholder with a 10mm 1mm pitch Baseer to allow cord grip to Base all the way in.
Does not come with any shade rings.
The height is 57mm and the diameter is 40mm
As this is a metal lampholder, ensure you use a 3 core mains flex to provide an earth connection to this lampholder.