The Jo-Ral 1B Trumpet Mute is an aluminum and brass model.

The acoustic design of Jo-Ral mutes creates an exciting tonal quality that results in near-perfect intonation. They are made of spun aluminum, and have been tested to perform evenly in all registers. Many models are also available with brass bottoms — offering a slightly warmer, moderately dark sound — or with copper bottoms which produce an even warmer, darker, rich sound.

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