British Made Brass Lampholder BC / B22 10mm Threaded Entry, Shade Compatible (Lock Ring Included)
Width - 32mm, Height - 45mm
This lampholder is great for table or floor lamps where a switch on the lampholder is not required - ie the lamp has a cord switch. It is made to a high standard in this country and is built to last. It will mount on a half inch male thread and can be reduced to 10mm female thread by using a reducer. Fits a 30mm shade hole.
If in doubt consult a qualified electrician