The M17C practice mute is suitable for cornets and trumpets. Its compact design allows it to be concealed in the bell of the instrument for transportation.
An adjustable resistance mechanism widens its range of uses and tonal possibilities.
Practice mutes have a similar conical design to straight mutes but with a solid cork bell seal to block off the sound. Air flow is greatly reduced and escapes almost silently through a small hole in the body of the mute. They are used for warming up and practising without disturbing the peace.