Wallace TWC-411-S Trombone Cup adjustable; Cup mute for tenor trombone (small and medium bore); adjustable and removable cup; made entirely of aluminium; very lightweight construction; very open cup sound; excellent intonation; can also be used as a straight mute without the cup; offers a warmer sound thanks to its unique cup and is ideal for use in orchestras; especially for big band and jazz musicians; this model was developed in collaboration with the Brussels Jazz Orchestra