Our lamp holder is made of high quality PBT material, heat aging resistant, good insulator, durable and sturdy. E27 to E27. The socket type is E27, so it is compatible with the standard E27 bulb. The direction of each socket can be adjusted, you can adjust them to the direction you want. A must for anyone who needs to convert a dull and dark place to a bright and bright place. Suitable for use with fluorescent bulbs in photography, home or elsewhere. Specification: Base Type: Standard base E27 White colorShell material: PBT Type: 3 in 1 (#1), 4 in 1 (#2), 5 in 1 (#3) (optional) Rated voltage: 90V-240V Rated current: 4A Heat resistance temperature: 120 Length of each socket: approx. 7.2cm / 2.8inch Total height: approx. 11cm / 4.3inch Package weight: approx. 182g (3 in 1 type socket), 220g (4 in 1 type socket), 244g (5 in 1 type socket) Package included: 4 in 1 E27 Socket adapter (bulb is not included) Note if you crash: 1. Bulbs are not included. And the color (red, white) of the electric wire is random. 2. Please allow 1-3cm error due to manual measurement. Thank you 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.