Description: 【Compatible】: Designed specifically for off road and rally RC cars, these axle hubs are ideal for enhancing the performance of your 1/10 scale 4WD vehicles 【Quality Material】: Crafted from quality steel, the drive input gear ensures reliable power transmission, making it an essential upgrade for your remote control vehicle's drivetrain system 【Part Number】: This replacement accessory is compatible with part number #6888/X, providing a accurate fit and maintaining the integrity of your RC car's great design 【Replace Part】: Ideal for remote control vehicle enthusiasts looking to improve their car's durability and performance on various terrains with quality parts 【Easy to Install】: Installation is straightforward, allowing you to easily replace old or worn out components and get back to enjoying your RC adventures in no time Specification: Material: Steel Size Chart:Front Axle Head Length: 1.9cm/0.75inch, Diameter: 1.2cm/0.47inch Rear Axle Head Length: 2cm/0.79inch, Diameter: 0.95cm/0.37inch Single Front Axle Head Weight: 6g Single Rear Axle Head Weight: 5.5g Package Includes:1 Front Axle Hub 1 Rear Axle Hub Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item.