This is a YAMAHA tenor trombone, model YSL-6430. It uses a small shank mouthpiece. In addition to the instrument itself, the following are included: ・Mouthpiece (YAMAHA 51B) (You can change the mouthpiece to Bach 12C (listed separately) for an additional 4000 yen, or add both for an additional 5000 yen.) ・Hard case (for transport) This is a "pro model" for intermediate to advanced players, and I believe it is equivalent to the current YSL-630 (list price 264,000 yen). It is a relatively rare medium bore trombone. Furthermore, the bell is 8.5 inches, the same size as a large bore trombone, which I think is a unique specification for a medium bore. It features a now-uncommon barrel-shaped balancer. As expected of a high-end model, it plays well. It responds well and has a bright tone, but because the bell is large, it resonates well and can produce a good volume. Personally, it gives the impression of a small large bore trombone. Because of its straightforward response, it can be used for all-around purposes depending on the mouthpiece combination. It is perfect for use in brass bands or jazz. For the listing, it has been cleaned with a cleaner and neutral detergent. The slide has been wiped to protect the inner tubes. It shows significant signs of use, with scratches, dents, and discoloration, but I believe it is at a level that does not affect performance. The slide has some plating wear on the inner tubes, so it is not like new, but the movement itself is good and it is at a level where it can be played without any problems. (It slides to the 7th position by its own weight.) I believe this is a product that does not have any problems with performance, but it is a used item, so please make your decision based on the photos.