The 6 X 71mm gearbox shaft in black is a high-quality replacement part specifically designed for HPI brand RC cars, particularly for the Savage 21 model. With a diameter of 71 millimeters and a length of 6 millimeters, this shaft provides the necessary stability and performance required for operating remote-controlled vehicles. Its precise construction ensures an optimal fit and functionality, making it an ideal choice for hobbyists and model builders who value quality and reliability. The black finish not only offers an appealing look but also protects against external influences. This product is sold as a single piece and is an essential accessory for anyone looking to keep their RC cars in top condition. The gearbox shaft is a crucial component that contributes to the vehicle's performance and longevity.