Yamaha YHR-871DUL Double HornThe newest model in our traditional Geyer style horn series delivers exceptional clarity as well as deep, rich resonance. Wrap Style and Bell An orthodox Geyer style wrap is used with a medium size bell and relatively thick rim wire. The tone is rich and deep with a solid core. Leadpipe A new leadpipe design in gold brass contributes to consistent tone and resistance throughout the instruments range. Bore Size This model features a 12. 1 millimeter