It can convert E27 base to the power socket that can be plugged into a common 2-pin plug. It is used to connect your E27 lamp socket for US or EU plug. Suitable for Home and Studio daylight bulbs in photographic use Description: Material:ABSandMetalandElectronic Component Color: As picture shown Size: 5x3.8cm or 1.94x1.49in Package Included:1 x Lamp socket Note 1.Our size are Asian Size,1-2 size smaller than euro size,please choose your size according to the size chart. 2.Due to the hand measurement, there have size error about 1-2 cm.Item color displayed in photos may be showing slightly different Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.