Jamie is a wonderful player living in the UK, and he is absolutely loving this mouthpiece. He has been on a vintage Meyer alto mpc forever, and he tells me he is so excited about what my Daddy-O is allowing him to do. Vibrant sound, better altissimo, bigger body of sound, and all the volume you could ask for in an mpc. His mouthpiece is a 5 tip, which measures .072. Made of the finest german bar stock hard rubber, and meticulously hand finished and heavily test played, one at a time.