The newest addition to the Ultimate line of marching brass, the 1151 was designed to meet all the demands of today's field drill performance. Sound, projection, ergonomics and innovation make this model the best tuba for any marching organization. This three valve BBb tuba was designed with a .734" bore, 21" bell, Fast Action tuning slide (Patent pending), a left view window through the body of the instrument (Patent pending), heavy duty leadpipe bracing, and shock absorbent bell to body bracing all with a weight of only 29lbs.