Thank you very much for viewing. This is a trombone mouthpiece, the A. Courtois (Courtois) Becche model 5L from France. This model was supervised by Michel Becquet, a world-renowned trombone player. I purchased it about 10 years ago, but I haven't used it much and have kept it in storage. There is some blackening and dirt on the rim and bore, but there are no major scratches or dents, so it can be used without any problems. If you'd like, please use it. Please consider this item, understanding that it is a used product.