Standard BC or B22 lamp is required.
Comes complete with a shade ring and will fit a shade with a 28-29mm hole.
As this is a metal lampholder, ensure you use a 3 core mains flex to provide an earth connection to this lampholder.
Shade Hole Size: 28mm
Cap Type: BC | B22 | Bayonet Cap
Thread Entry: 1/2"
Please Note: This 1/2" lampholder will NOT fit the 1/2" BSP gas pipe, BSP gas pipe is alot larger in diameter and is a totally different thread style.