Slide cushion rubber for trumpet / cornet. This is a set of 4. These are used to eliminate the "clack" sound when sliding and returning the 1st or 3rd trigger, but they also improve the appearance. (Usually 4 are used for a trumpet, and 2 for a flugelhorn.) If anyone is interested, please let me know. (If you need multiple sets, please contact me in the comments.) Thank you. m(_ _)m