This is a socket that allows you to convert an oil lamp to an electric bulb specification. I purchased it about 25 years ago. It is unused. It is compatible with two types of mounting mouths. Please check the size of the mounting mouth in the image. The switch is a turn type. This is a part that allows you to easily enjoy oil lamps. Please consider it. Size: φ88 x H49mm - Type: Socket - Cable length: Approximately 2.3 meters - Accessories: Ring - Switch: Yes - Plug type: 2-pin Thank you for viewing.