The Denis Wick DW 5533 Cup Bass Trombone Mute offers a versatile and good sounding way to mute a bass trombone. If the cup attachment is removed completely, then you have a special Straight damper. If you move the adjustable cup closer to the bell, the sound becomes much quieter and more matte. The cup can also be used individually, then you have a plunger. Not without reason this mute is so popular with musicians of all kinds. The damper is made of aluminium. The existing cork strips ensure a secure and perfect hold. The cup is equipped with a rubber lip to prevent scratches on the bell in any case. The intonation of the Denis Wick dampers is exemplary.