Product Introduction: The E27 light bulb holder is simple to use, professional and very practical, durable and can be used for a long time. Dimensions: The dimensions of the E27 lamp holder are base 75 cm, height 72 cm, and mouth 5 cm. Product material: Bakelite shell, all copper accessories, zinc alloy screw inner ring. Working voltage: 220-250V. This is a solid converter that will meet any of your needs for converting light bulbs. Application: Long service life and very durable. This converter changes the lamp base so you can use a bayonet cap bulb in a lamp that originally had an Edison screw-type bulb fitting.