System Blue offers two Trumpet mouthpieces, the TR1 and the TR2. In general, the two mouthpieces are very similar, they both have larger back bores and throats, and like all of the System Blue mouthpieces, they have a UV (not ultraviolet :-), but a mix of a U-shape and V-shape cup), and slightly sharper bite to assist with clarity of articulation. The biggest different between the TR1 and the TR2 is the actual cup size. The TR1 is geared more for “lead” players and has a smaller cup, whereas the TR2 is more of a “section” mouthpiece, and has a standard Trumpet cup size. Both mouthpieces are designed to work best with the System Blue Professional and Traditional Trumpets, but work well with ANY Trumpet.