Parduba James Model Trumpet Mouthpiece J5 James Models: Shallower with smaller 2nd cup, J4 5, J5, J5 5 The Harry James models feature the same double cup design as the standard Parduba trumpet mouthpieces, but slightly shallower with smaller 2nd cup for an easy high register The Harry James models feature the same double cup design as the standard Parduba trumpet mouthpieces, but slightly shallower with smaller 2nd cup for an easy high register