Standard E27 thread: Standard E27 thread lamp holder, it is recommended to use old retro E26/E27 bulbs (bulb not included). High-quality material: Aluminum lamp holder, internal iron and ABS structure, good texture, sturdy and durable. Safe to use: The old E26 E27 lamp holder is flame retardant, fireproof and waterproof. It is safe to use and can accommodate bulbs below 250W. Easy to install: Easy to install, surface mounting and fixed installation. Plug in a bulb and it will shine. Wide range of uses: Modern and retro combined, suitable for kitchens, bedrooms, study rooms, living rooms, corridors, cafes, offices, etc.