The Vintage OS Max 15 R/C Model Airplane Engine with Muffler is a high-quality 2-stroke engine designed for airplanes at a 1:5 scale. Made by the renowned brand O.S. in Japan, this engine is perfect for enthusiasts looking to power their remote control airplanes with a reliable and powerful source. The addition of a muffler ensures a quieter operation, making it a great choice for those who appreciate both performance and sophistication in their RC model vehicles.