【willie's Yamanashi JAPAN YT L5 2023】 This is a mouthpiece from willie's, which boasts high quality and a wide lineup, mainly for trombones. It is a new model in the YT series, developed in collaboration with Yu Tamaki, an international soloist, and produced in limited quantities. Compared to the "YT L5" released the previous year, the inside of the cup has been made smoother, and the smoothness of the tone seems to have improved significantly as a result. The inner rim diameter is 25.7mm, and the throat diameter is 7.2mm. It is in overall good condition, with no damage that would interfere with use. The box and sticker are also included.