The ES or E27 Half Threaded Lampholder in White is a 3 part lampholder that has screw terminals for easy connection of the wires. These are White plastic so there are no chipping like the painted type White type.
Comes with a 10mm female base fixing.
Height 55mm and diameter is 46mm widest part
Please note - The Metal cap selection comes with an earth connection point in the cap allowing for the termination of an earth wire, whilst the plastic version does not.