E27 Plain Nickel Lampholder With 20mm Base Thread 
E27 plain lampholder in nickel with a 20mm base fixing.
This lampholder is perfect for use on 20mm electrical conduit as it threads straight onto the ends of the pipe work creating a stunning industrial looking light fitting.
Comes with a small locking grub screw on the thread to stop the lampholder from unscrewing.
This is a plain lampholder meaning you cannot add a shade.
Thread: M20 x 1.5mm Pitch