Bach Trombone Mouthpiece 6 Finish 3416HA 1/2A, Silver-Plated (Large Bore)

It has the same rim and cup as the 6 1/2A narrow-bore trombone, but has a larger throat and backbore for a bass trombone, producing a rich, well-balanced, and loud sound. This size is suitable for first-string players and other players who need to produce brilliant high notes. ■Diameter: 25.4mm ■Cup depth: MD (slightly deep) ■Rim thickness: MW (medium), fairly round rim.