Upgrade your HPI car or truck with this assembled differential gear set from HPI Racing. Designed for the Wheely King 4x4, this set includes all the necessary parts for a smooth and reliable ride. The black color adds a sleek look to your vehicle. Compatible with electric, nitro, and glow fuel, this gear set is suitable for a variety of fuel types. It is also suitable for different scales, including 1:6, 1:8, and 1:10. Suitable for ages 8 and up, this gear set is made in Taiwan and is a must-have for any HPI Racing enthusiast.