Jiggs Mini pBone is a fully functioning, medium bore Eb tenor trombone constructed in ABS and glass fiber. It comes in an outfit complete with carry bag and mouthpiece. The pBone Mini was conceived by the team who brought Jiggs pBone to the world, and is aimed at young, beginner brass players taking their first steps.pBone mini is incredibly light and durable and its special mouthpiece makes it easy for the very young player to get a great sound and a quickly develop skills for crossing harmonics and developing a useful working range. It has a full seven positions and has been tuned to have a great first octave.