Yacht Car Mouthpiece Will Sanders Model SF3 17 1/2M (Inner Diameter 17.5mm / Throat Diameter 4.3mm) Standard Price: 16,500 yen Used only once in an orchestra concert. I am selling it because I no longer use it. The usage period after purchase was about 3 months (playing once or twice a week) and only once for the actual concert performance. It will be shipped after proper disinfection.