This Stirling Engine Model is a transparent science display that operates on DC power. Made from steel, this module has dimensions of 18 cm in length and 1 cm in height and width. It is designed for ages 8-11 years and features an open-spoke design, perfect for showcasing the inner workings of the engine. The elegant gold colour adds a touch of sophistication to this educational toy, which is sure to spark curiosity and interest in young learners. Made in China, this Stirling Engine Model is a fascinating addition to any collection or display. some slight wear to the steel and a few marks. otherwise great condition