This is the Greg Black 5G series, a standard choice among trombone players. Greg Black produces in small quantities, so domestic distribution isn't stable, and it's often difficult to obtain them when needed. The 5G excels in intonation, balance, and versatility across genres. It's a model that clearly explains why it's often said, "If in doubt, go for the 5G," and is a frequently used standard by both professionals and amateurs. This item is the 5G Medium model. The Medium model is characterized by: • A thick, solid core sound with high stability • A strong weight in the mid and low registers • Less likely to be buried in an ensemble It's a suitable model for use in orchestras, wind bands, large ensembles, and for those who prioritize a cohesive tone. Purchased new in December 2025, it has only been used once for a trial, so the condition is very good. Due to the limited domestic distribution, the next availability date is unknown. I was able to purchase the Heavy type, so I will sell this one to anyone who wants it.