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.Fits most wind instruments such as clarinet, oboe, etc.4.The rubber clarinet thumb rest cushion can eliminate thumb pain and relieve fatigue from long-term playing.5.Made of rubber material, tear resistant, and highly flexible.6.Helps keep fingers in the correct playing position and fits most clarinets.7.This clarinet soft thumb rest is shaped especially for your instrument.Specifications:Material: RubberColor: BlackBrand name: BQLZRSize: 17x16x10mm/0.66x0.62x0.39inch (LxWxH)Weight: 20 gPackage include:10 x Thumb Rest Cushion