The shell of our lamp holder is made of high-quality PBT material, heat-proof aging, good insulating, durable and sturdy. E27 to E27. The socket type is E27, so it is compatible with standard light bulb E27. The direction of each socket can be adjusted, you could adjust them into the direction you need. A must have for anybody who needs to convert a dull gloomy place into a place shining with light brightness. Suitable for using with fluorescent bulbs in photography, home or other places. Specification: Base Type: Standard E27 Base Color: White Shell Material: PV Type: 5 in 1(#3) Nominal Voltage: 90V-240V Rated Current: 4A Heatproof temperature: 120 Each Socket Length: Approx. 8.5cm Total Height: Approx. 15.5cm Applicable power:less than 18W Package Included: 1 x 3/4/5 in 1 E27 Socket Adapter (Bulb is not included) Please Note: 1. Bulbs are NOT INCLUDED. And the color(red, white) of electric wire is random. 2. Please allow 1-3cm error due to manual measurement. Thanks for your understanding. 3. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.