Perantucci PT-88+ Tuba Mouthpiece - 33.50mm cup diameter, wide deep cup, 7.0mm rim, flat well-defined inner edge, 8.10mm bore. The PT-88+ along with the PT-50 is the most widely preferred and used large contrabass tuba mouthpieces in the Perantucci line. The cup is wider yet not as deep as that of the PT-50. The sound has great strength and depth. Recommended for strong players, those who desire great dynamic range and an immense sound.