Upgrade your building block creations with this essential set of differential gears! This pack includes 5 complete differential gear assemblies, featuring yellow main gears and gray secondary components. Each set contains precisely engineered parts (numbers 65414, 69761, 69762, and 6589) that are compatible with popular building block systems. These technical modification parts are perfect for adding realistic movement and mechanical functions to your custom builds. The differential gear system allows for complex motion mechanics, making them ideal for vehicle builds, robotic projects, and other advanced technical constructions. The durable construction ensures smooth operation and reliable performance. Whether you're creating a sophisticated vehicle transmission or adding mechanical features to your latest project, these differential gears provide the technical foundation you need. This set is a must-have for builders who want to take their mechanical constructions to the next level.