How: 100% brand new and high quality Sound Cabinet is called the soul of stringed instruments. It is used as a structural support for foR stringed instruments and transmits sound from the record to the backboard. Moving the sound cabinet towards the fretboard tends to increase brightness and volume. Slide it towards the end to decrease the volume. Move it to the outside of the instrument to increase the brightness. Move it to the center of the instrument to increase the lower frequency. The sound loudspeaker is made of high-quality spruce wood with natural wood grain. Wear-resistant, ensuring the quality of the original sound. It is very suitable for improving the sound quality of the violin. Specification: Material: Spruce Color: Wood Color Column Diameter: 0.24 inch/0.6cm Column Length: 2). 76 inch/7cm Package Included: 10 x Violin Sound Note:1. Please allow 1-3mm error due to manual measurement. Make sure you don't mind before bidding.2. Due to the different light, angle and display taken by the camera, the picture may not reflect the actual color of the subject.3. Thank you for your understanding.