4 Pcs E27 Socket Adapter E27 Lamp Holder E27 Black Screw Socket Lamp Holder E27 Retro Edison Socket (Black) Specifications: A set of 4 E27 sockets, each measuring 54*56mm. The E27 lamp adapter fits all lamps with an E27 thread. The voltage is 250V. Material: The vintage e27 lamp holder is made of high-quality plastic and aluminum, offering good resistance to heat, corrosion, insulation, and electrical conductivity. Features: The lamp base's classic appearance complements light bulbs in various shapes and colors to match different interior styles. EASY INSTALLATION: Simply connect the wires correctly to the positive and negative poles of the E27 lamp holder, then assemble and tighten everything. APPLICATIONS: The Retro Edison socket fits all E27 models of threaded, LED, incandescent, halogen, and energy-saving lamps. Suitable for ceiling lighting and decoration, bedrooms, shops, offices, gardens, etc.