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.Length 6cm,Width 2cm,Height 2.6cm. 4.Provides extra thumb rest and protects your instrument and hands. 5.Alleviate the fatigue of long-term playing a musical instrument. 6.Easy to install, durable and portable.Suitable for saxophone. Specifications: Material:Plastic Color:Black Brand name: Unbranded.