【ULTIMATE BRASS BALDR】 This is a large-bore trombone mouthpiece from Ultimate Brass, an American manufacturer that produces high-quality mouthpieces through the cooperation of renowned musicians from around the world and advanced technical expertise. This is the BALDR model, and its size is similar to a Bach 5G. (※Rim Inner Diameter: 25.70mm, Throat Diameter: 6.88mm, Cup Depth: Medium Deep) The finish is gold-plated. There are some minor scratches, but there is no damage that would interfere with use.