Specifications: This E27 lamp holder made from high quality aluminum material is sturdy and durable. There are 2 types of humanized switches including a rotary switch and a pull sting switch. It features excellent heat resistance, oxidation resistance and rust resistance for long service life. Item Name: Lamp Holder Shell Material: Aluminum Wire Material: 0.75 Copper Core Wire Specification: E27 Occasion: Study, Porch, Toilet, Courtyard, Corridor, Balcony, etc. Feature: Retro, Stable, Easy to Install, Lamp Accessory Lamp Holder Inner Diameter: 41mm/1.61" (Approx.) Lamp Holder Outer Diameter: 50mm/1.97" (Approx.) Lamp Holder Height: 48mm/1.89" (Approx.) Lamp Wire Length: 1000mm/39.37" (Approx.) Ceiling Plate Diameter: 100mm/3.94" (Approx.) Notes: You will find more amazing products if you visit our store. Due to differences in lighting and screen settings, the color of the project may be slightly different from the picture. Due to different manual measurements,allow for slight size differences. Package Includes: 1 x Lamp Holder with Wire 1 x Ceiling Plate 1 Pack of Screws (4Pcs) 1 x Bracket