Standard UK fitting BC22 ('normal' bayonet pendant/lampholder).
Approximately 23cm (9 inches) diameter bonded 'string ball' with no dents, approximately 9cm (3,1/2 inches) holes in top & bottom. Any dust is free!
Please say in your first message when you can collect from Kidderminster, near Willowfield Drive shops at DY11 5HA - it can be left available if we have to go out.