Feature: This bulb screw socket can be used with the maximum top duration of 500W and the maximum voltage of 250V..It can be applied with multiple voltages. Application: This bulb converter Bulb socket can be used to transform your standard B22 bulb to fit any E27 fixture..It fits any E27 to standard medium bulb. Material: The adapter of the light socket is made of flame retardant PBT, is safe, high temperature resistant and durable..You will get 4 light socket adapters. Applicable occasions: The light converter base is ideal for living areas, bathroom, advertising, kitchen, outdoor lighting, bedroom. Easy to use: The bulb holder converter is easy to use, just screw into the existing socket , increases the length by 1.5 to 2.5 inches depending on how deep the bass you are screwing.