Lamp Holder Design : The E27 screw cap cord grip light holder with double shade ring has a ribbed lower section Lamp Holder Material: The holder is crafted from corrosion-resistant and anti-rust metal, ensuring durability for prolonged use Dimension: The holder measures 67.3mm in height, 48mm in diameter for the ring, and 39.5mm in diameter for the main body 2-in-1 Installation: The E27 bulb holder includes a screwable shade ring for installation with or without a shade. Properly connect wires to the positive and negative poles and assemble all parts as per instructions Wide Application: The lamp socket is compatible with various E27-based bulbs, making it ideal for DIY pendant lamps or hanging ceiling light projects, adding retro charm and elegance