 Marching euphoniums are used by marching bands in schools, and in Drum and Bugle Corps, and some corps (such as the Blue Devils and Phantom Regiment) march all-euphonium sections rather than only marching Baritone or a mix of both.Depending on the manufacturer, the weight of these instruments can be straining to the average marcher and require great strength to hold during practices and performances, leading to nerve problems in the right pinky, a callus on the left hand, and possibly back and arm problems.Marching euphoniums and marching baritones commonly have 3 valves, opposed to the regular euphonium having 4.