The 3B Scientific U49325 Sun Runner Stirling engine has a polished aluminum parabolic mirror for focusing solar energy and runs at 2,000 rpm, and demonstrates cyclic processes in thermodynamics. It measures 18 x 18 x 12 inches (H x W x D) and weighs 4lb. (H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.) The Stirling engine mounts on a camera-style tripod (sold separately) and is suitable for use in physical science classroom instruction.Science education products incorporate applied math and science principles into classroom and homeschool-based projects. Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities. Science education projects include a broad range of activities, such as practical experiments in engineering, aeronautics, robotics, energy, chemistry, physics, biology, and geology.3B Scientific manufactures anatomical models, simulators, charts, and other training materials for use in scientific, medical, and patient education. The company, founded in 1948 and headquartered in Hamburg, Germany, meets International Organization of Standardization (ISO) standard 9001: 2008.