Yamaha 51C4 trombone/euphonium mouthpiece for a small shank. I mainly used this for euphonium. There are no noticeable deformations, but it is a used item, so there are some minor scratches. There is no outer box. Please check the images. I personally think it can still be used actively! [Reference] Mouthpiece, silver-plated finish, small shank Rim inner diameter: 25.23 Throat diameter: 6.92 It has a slightly shallower cup than 51, allowing for powerful playing at high volumes. It has a rich sound across the entire range, suitable for symphony orchestra players. This item has been stored at home for a long time. Please forgive any small oversights. Returns and cancellations are not accepted. Please bid with understanding. *** Please Note *** * This is a layman's inspection. There may be measurement errors, stains, scratches, and other minor oversights. * Shipping will be via a method with compensation as much as possible. Depending on the packaging and shipping costs, it may be changed to a method without compensation, but we cannot be held responsible for any problems such as damage or non-arrival. * Depending on the size of the package, the shipping method may be changed from Rakuraku Mercari Bin to Yu-Yu Mercari Bin, or to regular mail. Please let us know if you have a preferred shipping method. * We try to respond to comments and ship items as quickly as possible, but there may be delays due to work or other reasons. * Cancellations and returns are not accepted after purchase. Please refrain from purchasing if you have any concerns. * If you have any other questions, please ask in the comments section. Thank you for your understanding.