Features: 100% new quality four-cylinder engine was born. Product design inspired by human industrial technology Color as shown Material: resin product Size: 14*10*9cm Product weight: 255 grams Package Included: 1 * Engine Note: Resin Jewelry Only Just a decoration, there may be color difference. In 1894, Maybach and Paul Daimler completed the development and design of the inline four-cylinder engine. The cylinder adopts the casting process and adopts the patented carburetor technology that Maybach just obtained in 1893. At the end of the 19th century, this Maybach inline-four was a must-have for almost every best car in the world. Polishing with professional abrasives perfectly interprets human wisdom and yearning in the era of large-scale industrial creation. Vision: to present the mechanical structure to the extreme, the transmission process is clear at a glance, showing the mechanical beauty of logic and power. Reduction degree: Based on historical classic inventions and products, it presents an intuitive display of the core operating principles of the machine and the core value of the machine.