The QE vapor-proof lamps body and guard cage are made of die cast aluminum and finished in epoxy powder coating paint for long-lasting life. The socket is a standard porcelain body with a copper shell connector. Accepts standard 100-watt bulbs (not included) with a clear lime glass globe. Designed to work up to -40 degrees Celsius / -40 degrees Fahrenheit, overall size is 4-1/4″ (108mm) diameter, 9-1/4″ (235mm) long including wire guard. Threaded plugs are provided for openings when not being utilized. Conveniently individually boxed and packaged.