For equipment reorganization, I am selling this item. Manufacturer: Schilke 59 (Large Shank) Size: Inner rim diameter (mm): 28.52 Please note that this is a long shank mouthpiece. In my personal opinion, Schilke mouthpieces have a slightly unique rim shape, and the size feels a bit larger than stated. Also in my opinion, perhaps due to the long shank, it gives the impression of a slightly thicker, more focused sound than the standard 59. As it is an old mouthpiece, there is noticeable plating wear and dullness on the surface, but the plating on the rim and inside the cup appears to be in good condition.