This is a Helberg 2 model from about 20 years ago. The mouthpiece characteristics vary depending on the year it was made, so please take a look if you're interested. I've used and stored it with care, but it's an old mouthpiece, so there is some blackening of the plating. However, it does not affect playing. Here are the specifications: For B and C trumpets Inner rim diameter: 32.79mm Throat diameter: 8.02mm Cup: Deep V cup Shank: Standard (Universal)