Generally, there are natural eggshell materials, crystal/acrylic, glass, metal, resin, wood, ceramics and paper in the domestic market.
domestically, the movements are divided into 18 tones, 3 tones, 5 tones, 78 tones and 156 tones. The more the number of steel bars, that is, the higher the number of tones, the richer the timbre, and the better the tune, and the longer the playing time of the tune. < P > Even in high-end music boxes with more than p>3 tones, the price is more than 4 yuan in China, and the music can be customized at the same time, but the development cost varies from 5 yuan.