2x Rs390 Electric Motor Gearbox 12v 20000rpm Car Dc Motor Gear Box For Kids Car Toy This is a great electric motor gearbox used for children's cars.The middle gear is made of metal which is more sturdy and durable.It will make quite low noise and more wear-resistant.It will be a great replacement part for your broken or old ones.The voltage is 12V and the speed is 20000RPMName:Electric Motor GearboxTotal length: Approx. 16.5cm / 6.5 inchHole Diameter: 1cm / 0.39 inchTorque: Motor GearboxMaterial:PPandPMcolour:blackPackage Contents:2 x DC MotorOnly the above package content, other products are not included.Note: Light 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.