The lampshade adapter ring is compatible with most lampshades made in Europe.Made of sturdy hard white plastic, Socket Replacement Ring is not easily deformed and durable. Function: by turning the reduction ring to fix the bulb and lampshade. Adjust the lamp shade to fit the size of the bulb.Easy to use: No need to use any tools, the installation can be completed in a few seconds. Application: Screw bulbs lamp holder widely apply for table lamp, desk lamp, floor lamp, plate light,bedside lamp, etc. Name: Cassette lamp holder Colour: White Material: PP Package Contents: 5 x Lamp holder (Only the above package content, other products are not included.) Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. 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. Sold by-Dadangjia