feature:100% brand new qualityThe birth of the four-cylinder engine. In 1894, Maybach and Paul Daimler completedR&D and design of in-line four-cylinder engine. Cylinder adopts castingThe process uses Maybach's patented carburetor technology just obtained in 1893. At the end of the 19th century, this Maybach inline four-cylinder engine was essential for almost all the best cars in the world.Polished with professional abrasives, perfect interpretation of the big industryThe human wisdom and yearning of the creation era. Vision: present the mechanical structure to the extreme, and the transmission process is clear at a glanceAt a glance, it shows the mechanical beauty of logic and power.Reduction degree: based on historical classic inventions and products, presenting core principlesThe operation of the machine and the intuitive display of the core value of the machine. Product design inspiration comes fromHuman industrial technologyColor as shownMaterial: ResinProduct size: 14*10*9cmProduct weight: 255gThe package includes:1*engineNote: Only resin jewelry