Pack Of 3 Porcelain Mogul to Medium Light Bulb Socket Adapter, E26 To E39 Reducer Allows the use of a E26/E27 light bulb in a E39/E40 mogul base fixture White porcelain shell material, aluminum screw Safe and convenient to use High temperature resistant, perish assistant, and anti-burning Can take up to 660 Watts and 250 Volts