Enhance your model railway builds with this essential 4-piece train wheel set from RCmall. Each set includes sturdy black wheel assemblies and metal axles designed for smooth rolling performance. These technical building block parts are compatible with power function tracks, making them perfect for creating dynamic train models and motorized railway systems. The set features a robust construction with specialized mounting points that integrate seamlessly with standard building block systems. The wheels are engineered with precise dimensions to ensure reliable operation on compatible tracks, while the metal axles provide the necessary stability and durability for long-lasting use. Whether you're building a custom locomotive or expanding your existing train setup, these wheel sets deliver the functionality needed for your creative building projects. The package includes all necessary components for two complete wheel assemblies, allowing you to get your train moving right away.