Thank you for viewing. This is a custom part, similar to a ligature used for woodwind instruments, that allows you to easily change the tone. Simply attach it to the mouthpiece to increase the volume of the sound and enhance its potential. Despite its small and simple appearance, it is finished with "15 microns" of silver plating, which is 1.5 times thicker than usual, and is highly praised for its significant effect on the tone. Silver plating focuses the sound and makes it clearer. It can be used with standard Schilke and Bach mouthpieces. Please note that it may not be compatible with some specially shaped mouthpieces. The mouthpiece in the image is not included. There are some minor scratches, but there are no major scratches, dents, or peeling of the plating that would interfere with playing. Please refrain from comments asking for a price reduction. Immediate purchase is OK. If you are interested in used or new mouthpieces, please search for Net Brass. net-brass.com