YAMAHA SB2X Euphonium Silent Brass Mute PM2X I've used it a few times, but I'm selling it because I don't use it often. The outer box is missing. There are no noticeable scratches, but please refrain from purchasing if you are concerned about minor imperfections due to my personal handling. The following is a description from the retailer: Yamaha's Silent Brass series, the leading brand in the "practice mute" category. It has been a great success with a major upgrade for trumpets, horns, and trombones after more than a decade, and now a long-awaited upgraded version is available for tubas and euphoniums. In addition to being lighter and more compact than previous models, the outstandingly natural playing feel and the high quality as a pickup mute are unmatched. With the freedom of external input and output, you can connect effects and loopers to discover new ways to enjoy it, making it a product that goes beyond the realm of a practice mute. It can be folded and stored inside the bell. Available for immediate purchase.