Lamp Holder Material: Ceramic body with excellent insulation and efficient heat dissipation. Fireproof and high-temperature resistant, and more durable than other light socket options. Dimension: The holder has a height of 46 mm, a Width of 40mm for the main body, a Width of 33mm for the Top Holder. Compatibility: The E27 screw lamp holder is suitable for all kinds of LED light bulbs with a maximum power of 60W. Easy Installation: Connect the wires correctly to the positive/negative pole, and then assemble all the parts. Installation instructions are attached Application: Used to replace old or damaged bulb sockets and DIY lighting fixtures. Suitable for E26 E27 base halogen, CFL, LED light bulbs and heat lamps.