1. Made of high quality, durable and practical
2. Small size, light weight, easy to install
3. High temperature resistant, anti-burning PBT and anti-aging
4. Suitable For all voltage
5. Used on LED/ Halogen/ CFL light bulb lamp

From the Manufacturer: 

Note: In the E26 Lamp Holder Conversion Using MR16 Bulbs. Does Not Convert Voltage!!!

LED Halogen CFL Light Bulb Lamp Adapter E27 to MR16 Light Lamp Bulbs Adapter Converter. 

Suitable for all voltage 

Color: White 

Dimensions: (43 x 28)mm / (1.69 x 1.10)in(L x Dia) 

Package Includes: 4PCS x E27 to MR16 Converters