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.Simple to use, easy to install and remove.4.It would make a good mouthpiece for a beginning saxophone student or as an extra mouthpiece.5.Design facilitates harmonics, streamline ensures player's comfort,Features a high baffle design with special tone chamber for fast response.6.Fit for 5 Tenor saxophone Mouthpiece.Specifications:Material: BrassColor: SilverBrand name: YibuySize: 5 Length: about 110mm/4.33inchDiameter of the hole: about 17mm/0.67inchTone: bBType: Falling Tune BSize: 11x1.7cm/4.33x0.67inch(HxDia)Weight: 137 gPackage include:1 x Saxophone Mouthpiece