Description: The shell of our lamp holder is made of high-quality PBT material, heat-proof aging, good insulating, durable to use. Allowing 4 or 3 bulbs installed in one single socket at the same time, easy to increase lighting intensity, so it is suitable for using with fluorescent bulbs in photography, home or other places. Features: With CE and ROSH certificate, and 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. Allowing 4 or 3 bulbs installed in one single socket at the same time, easy to increase lighting intensity. 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: Condition: 100% Brand New Base Type: Standard E27 Base Color: White Shell Material: PBT Type: 3 in 1, 4 in 1 (Optional) Nominal Voltage: 110V-240V Wattage Of Each Socket: 60W Heatproof temperature: 120 3 in 1 Type Socket Size: Each Socket Diameter: Approx. 3.8cm / 1.5inch Total Height: Approx. 9.4cm / 3.7inch 4 in 1 Type Socket Size: Each Socket Diameter: Approx. 3.8cm / 1.5inch Total Height: Approx. 10.2cm / 4inch Package Weight: Approx. 162g(3 in 1 type socket), 197g(4 in 1 type socket) Package Included: 1 x 3/4 in 1 E27 Socket Adapter(Bulb is not included) Please Note: 1. Bulbs are NOT INCLUDED. 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.