This is an inner gold mouthpiece I purchased a few years ago. I believe it's suitable for mid to low range due to its large bore size. I'm selling it because it doesn't suit me. Although I haven't used it much, there are signs of use on the shank. It has been cleaned and disinfected. There is no case. I will wrap it in bubble wrap for shipping. Shape: U-cup Inner rim diameter: 17.5mm Cup depth: Normal Bore size: 4.2mm