Feature: This screw socket can be used with a maximum duration of 500W and a maximum voltage of 250V. It can work with multiple voltages. Application: This power converter bulb socket can be used to convert your standard B22 bulb to fit any E27 light fixture. It fits any E27 bulb into a standard medium bulb. Material: The socket adapter The lamp holder is made of flame-retardant PBT, safe and high temperature resistant, and durable. You will receive 4 lamp socket adapters. Applicable occasions: The light converter base is ideal for living rooms, bathrooms, commercials, kitchens, outdoor lighting, and bedrooms. Easy to use: The lamp socket converter is easy to use; simply screw it into the existing socket and increase the length by 1.5 to 2.5 inches depending on the depth of the screwed-in base.