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 is made of Metal and Felt,easy to use and carry. 4.It Can eliminate unnecessary overtones. 5.The internal tone control system is compact and easy to use. Specifications: Material:Metal and Felt Color:Black and Silver Brand name: Unbranded Size:14.5x6cm/5.7x2.36 inch(LxW) Cotton pad center to handle 11cm .