High-Performance Motor: This 12V 390 20000RPM drive engine is specifically designed for kids' ride-on cars, ensuring a powerful and high-speed experience. the gearbox size matches your child's electric car for optimal compatibility. Precise Specifications: The motor features a model number of 390 20000RPM with a voltage of 12V. It has a shaft hole diameter of 12mm (0.47 inches) and a length of 165mm (6.5 inches), designed to fit perfectly in compatible ride-on toys. Compatibility Check: Before purchasing, please verify that this gearbox has the same appearance as in your child's ride-on toy. This ensures that the replacement will fit and function correctly without any modifications. Installation Advice: your ride-on car is operating correctly before installing the new gearbox. Check the battery's condition and the connections of the battery cables to avoid any power issues that might affect performance. Maintenance Tips: Regular maintenance of your child's ride-on car can significantly enhance the gearbox's lifespan and performance. Check the gearbox periodically for any signs of wear and tear, and replace it when necessary to keep smooth and enjoyable. Please note:the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Black Material:plastic+metal Package Contents: 2 * Kids Electric Ride On Car Gearbox Replacement 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.