Features: 1.Every product has a unique Manufacturing Part Number label on the inner package that proves it has been qualified,which include Part Number,Model Number and inspection date information; 2.If you have any questions about the item,please provide us the Manufacturing Part Number for checking,your profits will be guaranteed. 3.It helps improve Tone, volume and sustain, make string changes fast and easy. 4.Metal construction offers long durability,and it is easy to be installed and uninstalled. 5.It will instantly upgrade the look and feel of your mandolin. 6.Suitable for Round Back mandolin instruments. .
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