RS390 12V 16000 RPM Car Motor Gearbox Compatible with Kids' Electric Car Toy Accessories This is a fantastic electric motor gearbox compatible with children's cars. The internal gear is made of metal, making it more robust and durable. It will run quietly and be more wear-resistant. It's an excellent replacement for broken or old gearboxes. Voltage: 12V; Speed: 16000RPM Name: Electric Motor Gearbox Total Length: Approx 16.5cm / 6.5 inches Hole Diameter: 1cm / 0.39 inches Torque: Motor Gearbox Color: Black Material: Plastic Package Content: 1 * Electric Motor Gearbox (Only the above package content, other products are not included.) How to distinguish the motor model: 1. Generally, the model will be written on the motor, for example, 6V390 will write RS390-6VDC. 2. If the writing is worn, you can judge the model with the following data: 390 Motor length is 4.6cm, diameter 2.75cm, gearbox length 16.5cm, opening 1cm Note: Please allow 2-3cm difference due to manual measurement. Besides different computers display colors differently, the color of the actual item may vary slightly from the below images, thanks for your understanding (1 inch = 2.54 cm)