Specification: Rated voltage: 250V Rated current: 4A Total Size: About 58x39mm (HxW) Material: Metal warmth resistant plastic Features: Lamp holder dimensions are 56m excessive by way of 43mm (with lamp coloration collar) 28mm without; and has a M10 (10mm) screw mounting thread. It has a 28mm ring thread with lamp shade collar that may be removed to permit the right of a lamp shade. Package Included:1x E27Light Bulb Lamp Holder