Features: From a combination of metal and plastic, this musical movement is precise engineered through 3D printing, ensuring easy assembly and a unique auditory experience. Hand crank/clockwork design, no electricity required, environmentally friendly and fun for DIY enthusiasts. 3D printed precise components, easy to assemble, provides a unique musical experience and hands-on fun. Suitable for modelings enthusiasts, music lovers and those for creatived gift. Can be used for home entertainment, educational programs or as unique interior decoration. Specifications: Name:Wind up Musical Movement Type：Hand crank model / Wind-up Model Size: about 44.5x34.5mm/1.75x1.36in 50.5x43.5mm/1.99x1.71in Component: Metal Package Includes: 1PC Musical Movement note: Due to light and screen differences,the item color may be slightly different from the pictures. Please allow 0.5-2cm differences due to manual measurement