I purchased a few, but I've decided to use 5G, so I'm offering this one for sale. This is a representative model from **Greg Black**, a brand with immense trust among trombone players. It's a premium brand with very limited domestic distribution and strong support from professional musicians. The 5GS is the most versatile and is considered a standard model, often recommended as the first choice. This particular model is the most popular regular weight version of the 5GS. It's Greg Black's most popular model, different from both light and medium weights. It offers excellent control and a good high-range extension, making it recommended for large ensembles like orchestras, as well as solo performances. The mouthpiece is attractive for its consistent sound from low to high registers. It features a comfortable grip and a stable feel in the mouth. Diameter: 25.8mm Cup Depth: Medium Retail Price: ¥57,200