Jupiter JHR1000M Marching French Horn - BbOutfit your marching band for success with the Jupiter 1000 series Marching French Horn. This robust instrument serves as the alto voice in your marching band, fleshing out the upper brass section by providing dramatic tonal colors. The JHR1000M features a yellow brass body, a 0. 468 inch bore, and a 10 inch bell, all of which contribute to this horns ease of playability and powerful projection. Brass specialists also note the fast, fluid action of