Product Description: Advantages: 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.Outer Diameter:23mm/0.9inch inner diameter: 18mm/0.7inch4. Fit for trumpet finger button replacement and repairing.5.Exquisite craftsmanhsip, convenient to use.6.A set includes 3 pcs Top Valve Caps,3pcs Bottom Valve Caps and 3pcs Finger Button.Specifications:Material: CopperColor: CopperOuter Diameter:23mm/0.9inch inner diameter: 18mm/0.7inchWeight: 760 g Package include:15 x Top Valve Caps15 x Bottom Valve Caps15 x Finger Button Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin