Black E14 fitting. Lamp socket, with a screw thread on the outside.
The small round opening that you see at the top of the fitting has a diameter of M10 (that is 1.0 cm / 0.4 inch) and is equipped with (internal M10x1) screw thread.
Internal thread on top: M10x1
|Height of fitting (cm):||5.5 ( = 2.2 inch)|
|Outer Diameter (cm):||2.7 ( = 1.1 inch)|