这是一个19mm直径的球体，是为了匹配19mm乐高积木万向轮外壳而设计的，因为是3d打印的球体，最好在使用前进行一定的打磨，确保表面光滑让使用更加顺滑。
This is a 19mm diameter sphere specifically designed to match the 19mm LEGO brick universal wheel housing. Since this is a 3D-printed sphere, it is recommended to sand it properly before use to ensure a smooth surface for a more seamless user experience.

积木万向轮 适配19mm直径铁球 兼容乐高：
（国际站）[https://makerworld.com/models/1373727](https://makerworld.com/models/1373727) 
（国内站）[https://makerworld.com.cn/models/1185346](https://makerworld.com.cn/models/1185346)