FINELED B22 to GU10 Lamp Adaptor, Light Socket Holder, B22 to GU10 Lamp Bulb Base Socket Converter (5 PACK) TransformsLight B22 To GU10 Lamp Bulb Socket Material: Metal Solder, anti-burning PBT and Ceramics High temperature resistance around 200 degree Voltage max: 250V Current max: 2A Practical and durable, easy to install