Thank you very much for viewing. This is a VINCENT BACH trombone mouthpiece, model 6-1/2AL. It's a small shank, so it's for a tenor trombone. The 6-1/2AL is one of the most standard sizes in Bach mouthpieces. I bought it about 10 years ago, so it has some dirt, but there are no major scratches or dents, and it can be used without any problems. Please use it if you like. Please consider this item, understanding that it is a used item.