This is a standard mouthpiece for lead trumpet and piccolo trumpet in big bands. The inner diameter rim size is slightly smaller than a Bach 5. The rim is flat and thick. The cup is a gentle W cup, similar to a Bach E. It has a soft feel on the mouth and a clear outer rim edge, making it easy to grip. The throat is #27 (3.66mm). The backbore is similar to a Warburton 10. The shank end thickness is about 0.6mm. It produces a rich, powerful sound with a core. High notes are easy to play, with a brilliant and resonant feel. It's easy to control brilliant and fast high notes. This is a convenient mouthpiece to have for pop music and high notes.