This is a wonderful mouthpiece. Orginally for trombone, but works very well on euphonium. This is the most popular mouthpiece from the Bousfield Griego range and is arguable the most traditional. I find on euphonium it makes a wonderfully focused sound, but also has plenty of depth to it as well.  Slightly smaller than the Wick 4AL, but still retains the sound and has more flexibility.