Thank you for viewing. This is a Yamaha Hino Terumasa model TH-1. Among the Hino models, the TH-1 is a small model with a bore of 15.67mm. The throat has been expanded to around #13 (4.57mm). It has a design that allows for smooth airflow. If you are interested in more detailed sizes, shapes, playing feel, used mouthpieces, or new mouthpieces, please search for "Net Brass". There are some minor scratches and dents, though you won't feel them on your lips. There are small scratches and scuffs on the rim, body, shank, and shank end. There are no major scratches or dents that would interfere with playing. Please refrain from comments asking for a price reduction. Instant purchase is OK. If you are interested in used mouthpieces or new mouthpieces, please search for "Net Brass". net-brass.com