General description The E27 Socket Adapter is a set of 4 black E27 bulb holders designed for retro light bulbs. Made from durable plastic and aluminum, these sockets are perfect for lamps and pendant lights, providing a reliable connection for your lighting needs. Technical specifications Product Name: E27 Bulb Holder Material: Plastic + Aluminum Quantity: 4 pcs Color: Black Rated Voltage: 250 V Rated Current: 4 A Size: Diameter: 40 mm Height: 52 mm Center Hole Diameter: 9 mm Height Outer Teeth: 22.2 mm Ring Outer Diameter: 56 mm Installation Easy to install in a short time. Ensure not to tighten the lamp base and housing before installation to avoid damaging the bracket. Usage Suitable for lamps and pendant lights. Designed for long-term use with a precise connection for reliable power.