This E27 Threaded White Lampholder comes complete with an internal earth connect if needed. It has a fully Threaded skirt so you will need 2 shade rings if you need to hold a lamp shade. The base fixing in 10mm and has a locking screw on this fixing to stop it twisting when the lamp is removed. The ES Threaded White Lampholder is also known as a European Lampholder.
Height is 54mm and the diameter is 39mm
Lamp shade fixing hole needs to be 40mm