Friedman Large shank; This mouthpiece is based on a 3G type dimension, but with a medium rounded rim, more funnel shaped cup and slightly narrower throat for more focus in the upper register. Produces a large, warm modern symphonic sound, but requires a strong, focused embouchure and air stream to produce the desired center for 1st and 2nd large orchestra tenor trombone parts. Compares to Hammond 10 rim. Large stem only.