G12 Male to E26 or E27 female socket converter. CE and Rohs listed. Great when you want to use standard Edison screw base bulbs, but do not want to remove/replace existing fixture. Made from PBT material with a copper contacts. Rated 4 amps @ 220 VAC 880 Watts. This converter can operate up to 277 VAC but you must reduce the Amperage by the increase in Voltage. This converter is two pieces of metal that is encased is plastic materials. The two pieces of metal make electrical contact from the two contacts of G12 to the threads and inner contact of the E26. This converter has no electronics so if you bulb cannot handle a ballast you must remove the ballast since you are replacing the G12 ballasted bulb with a standard E27 non ballasted bulb that does not operate at the reduced voltage that a E26 bulb operates at.