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 have for anyone who needs to convert a dull, dim place into one that shines with light and brightness. Suitable for use with fluorescent bulbs in photography, at 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 plug), 220g (4 in 1 type plug), 244g (5 in 1 type plug) Package included: 4 in 1 adapter E27 Socket (bulb is not included) Note if you plant: 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.