The Balu Medium/Small Bell French Horn Practice Mute is the third generation of practice mute design. The Balu Medium/Small Bell Practice Mute features a negligible air resistance design to allow the player a quiet mute that keeps the center of the sound focused, and eliminating intonation problems. . In collaboration of top musicians and artists, Balu Mutes are able to provide some of the world's best mutes, including a Horn practice mute with negligible air resistance. Balu Mutes manufacturers mutes for Horn, Trumpet, Trombone, Euphonium and Tuba.