High quality material The bakelite lamp holder shell is made of high quality plastic material, and the gasket is made of high-precision brass, waterproof and dustproof, good insulation, resistance to corrosion, resistance to rust and durability, and has a function of protecting against electric shock. Easy to use Connect the wire to the positive / negative pole correctly, then assemble all the parts together. It can be installed and dismantled at any time, which is very convenient and practical. Retro design Black retro E27 socket can create classic atmosphere and simple retro beauty. Combining different lamps and lampshades can produce a different sense of fashion. Parameter Nominal voltage: 250 V; Rated current: 4A; Maximum temperature resistance: 180 ; Diameter: 38.5 mm. Scope Applicable to all E27 screw-on lamps, most commonly used in E27 Edison bulbs and retro chandeliers. It is also suitable for LEDs, incandescent lamps, halogen lamps and economy lamps energy, to DIY decorative chandeliers. Suitable for homes, offices, restaurants, bars and other retro decorations. Features: -Use insulating materials to protect your electrical safety. Special molds are refined to produce clearances, clamps, threads and other parts, which are firm and easy to use. -Copper foil is conductive, has a high excitation rate, is resistant to corrosion and wear, and is durable. -Standard production system, all products have passed CE and CQC certification standard. Color: black Material: copper foil + bakelite Size: 53.5 * 38.5mm Weight: 33.4 g * 10 Quantity: 10 The package includes: bakelite lamp holder * 10 Warm notice: 1.Please allow a little size error due to manual measurement. 2.Due to lighting effects and monitor's brightness / contrast settings etc, the color tone of the photo and the actual item may be showing slightly different.