The Hex Brass Coupling is a compact and durable wheel coupling designed for use with the 130mm Robot Wheel for All Terrain and DIY Robotics. Made from brass, it provides a strong and reliable mechanical connection for compatible wheel and motor assemblies. It features an 18.05mm total length, 12mm edge width, and 6.1mm bore diameter, with a lightweight design weighing approximately 12g. Ideal for DIY robots, all-terrain vehicles, robot cars, and custom robotic wheel mechanisms. Images are for representation only; the actual product may vary slightly in appearance.