Ultimate Brass Curran Orchestral Silver Plated SP ◆ Rim Inner Diameter: 28.93mm ◆ Throat Diameter: 8.08mm ◆ Cup Depth: Deep ★ Beautiful condition, tried only a few times after being purchased new. There are some scratches on the shank from actual use, but the appearance is almost like new. "Curran" is the signature model of George Curran, the bass trombone player of the New York Philharmonic. Orchestral is a modern symphonic design that supports a wide range of tones. Ultimate Brass is a manufacturer that produces products in the United States. Founded in 2013 by SUN He, bass trombone player of the Oakland Symphony Orchestra. Unlike other brands, they do not use numbering according to size, but name their products based on their respective purposes and images.