Onite 10 pcs GU10 LED Lamp Socket Holder, GU10 Base Halogen Adapter Ceramic base with Heat resistant silicone coated wire lead (length:15cm). Pre-stripped wire ends and snap-to-fit installation for easy fitting. Socket Material: Insulating Ceramic and Metal Shrapnel. Wire Material: Copper Nickelplated and Insulating Silicon Tube. This Bulb Holder can fix your GU10 Base Bulb with 12V-240V. Two slotted holes for bulb contact pins, and the other two holes for affixing screws. Package: 10 x GU10 Sockets, Solid build and great finish, 2 Years Warranty.