Specifications Diameter: 90mm x 90mm, Direct connection to 220V-250V electricity.High quality materialE27 ceiling socket made of high quality ceramic screw head + fireproof housing + brass, is safe and durable for daily life.Easy InstallationQuick and easy assembly with the screw (not included), then all you have to do is screw in the bulb.Widely UsedThese lamp holders E27 are suitable for various E27 screw bulbs and adapt to a variety of lights, signs and displays.Applicable occasionsThe white ceiling light brackets can be installed in wine cellars, storage rooms, garages, attics, stairs, hallways, balconies and other places to bring you ideal lighting. Product Description Easy and convenient for installation. Ceramic screw head, heat resistant and more durable. Flame retardant ABS plastic body, safe for use. Specification: Material: Flame Retardant PC Plastic+Copper+Ceramic Size: 90 x 90 x 55 mm Type: E27 thread Rated current: 10A Rated voltage: 220-250V Note: 1. Mounting screws are NOT included. 2. Please allow 1-3cm errors due to manual measurement. Package includes: 4 x E27 screw socketWithout screws