●Material: The trumpet valve caps are made of zinc alloy and natural stone material, hand polished, and is beautiful and durable, can be used for a long time. ●Application: The trumpet valve cap is designed for the replacement and maintenance of most models of trumpet finger buttons, suitable for most trumpets on the market. ●Function: The trumpet valve caps can replace old, broken, or missing finger buttons, improving the accuracy of keys and the fluency of performance. ●Size: The trumpet finger buttons is approximately 1.5x1.5cm/0.59x0.63inch in size. The trumpet valve caps are easily replaced. It is a good instrument trumpet accessories. ●Cheerock provides 24hrs customer service. If you are not satisfied or have any questions, please feel free to contact us to get a satisfied solution.