Optimized Performance: This 12V 390 20000RPM drive engine is specifically designed for children's ride-on cars, ensuring a and optimal functionality. the gearbox size matches your child's electric vehicle for seamless compatibility. Precise Specifications: Featuring a model number of 390 20000RPM, this gearbox has a voltage of 12V. It includes a shaft hole diameter of 12mm (0.47 inches) and a total length of 165mm (6.5 inches), designed for precise replacement and easy installation. Compatibility Check: Before purchasing, verify that this replacement part has the same appearance and specifications as the part in your child's electric ride-on toy. This ensures a smooth and efficient replacement process. User-Friendly Installation: Equipped with quick-change wire connectors that require no soldering, this gearbox allows for fast and easy installation and removal. Check your vehicle's functionality, including battery and cable connections, before installation. The actual product may have slight color difference or difference, which will not affect the use Colour:Black Material:Plastic + Metal Package Contents: 1 x Gearbox with DC Motor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.