Durable Material: Our retro E27 socket is made of high-quality plastic bakelite, which is durable, flame retardant, heat resistant, corrosion resistant, insulating, non-flammable, and has a long service life. Retro Design: The E27 lamp holder features a classic black retro design that works well with most retro bulbs and pendant lights, adding a vintage vibe to your home. Specification: Bakelite lamp holder thread is E27, compatible with all E27 threaded lamps. Holder diameter is 3.9 cm, height is 5.4 cm, central hole diameter is 1 cm, outer tooth height is 3.5 cm. Ring OD 5.6 cm. Rated voltage: 250V, rated current: 4A, heat resistant up to 180°C. Easy Installation: Connect the wires to the positive and negative terminals of the E27 lamp holder, then assemble and tighten all parts. Simple to install and use. Wide Application: Suitable for most light bulbs, LED lamps, and DIY pendant lights. Can be widely used in living rooms, bedrooms, hallways, bars, cafes, restaurants, shops, bathrooms, bookstores, stores, offices, and gardens. Enhances rustic and decorative lighting environments.