Features Premium Material: Crafted from high-quality materials, ensuring a durable and strong structure for long-lasting use. Exquisite Workmanship: Features a smooth metal without noticeable scratches, showcasing meticulous attention to detail and quality craftsmanship. High Moment of Force: Delivers strong power and stable rotating speed, providing reliable performance for various applications. Compact and Lightweight: Designed in a compact size and light weight, offering low noise and stable performance for a seamless user experience. Versatile Applications: Suitable for a wide range of uses, including toy cars, children's motorcycles, and more, making it a versatile and practical choice. Specification: Motor Model: RS550 Tooth Head Size:10*m, 13*m Voltage: 12V Revolution: 550-30000, 550-23000, 550-18000, 550-15000, 550-12000, 550-10000, 550-8000 (Optional) Motor power: 35W - 55W Motor total length: 8cm / 3.1in Motor width: 3.7cm / 1.5in Bottom diameter: 3.5cm / 1.4in Mounting hole: 2.5cm / 1in Motor shaft: 0.3cm / 0.1in Package List: 1 x Motor 2 x Tooth Head Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Before purchase, it is necessary to verify whether the motor model and the tooth size match. Package List: 1 x Motor 2 x Tooth Head Package List 1 x Motor 2 x Tooth Head