Features: Make of Brass materials and Shells inlays buckle, enduring, exquisites and beautiful. Easy to operate and install Helps to improve the accuracy of key and the smoothness of the playing. A good replacement accessory, replace the old and broken product. Easy to install, Enduring, small size and can replace your old parts. Suitable for the replacement of small buttons. Suitable for trumpet player, these button fasteners tool are a necessary accessory. Specifications: Materials: Brass Size: As Shown in the Picture Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 3pcs Trumpet Connecting Rods 3pcs Trumpet Finger Buttons 3pcs Trumpet Top Valves Covers 3pcs Trumpet Bottom Valves Covers