This is the Microcosm M36, a high-precision, miniature twin-cylinder steam engine model. Product: Microcosm M36 Steam Engine Model. 1 x Microcosm M36 Steam Engine Kit. Perfect for Multiple Uses: Ideal for powering model boats (hull length 600-850mm), as a unique desktop demonstrator, a collector's centerpiece, or an educational tool to spark interest in physics and engineering.