Model PT-88, PT-88L and PT-88+
Perantucci Best-Seller

Cup Diameter : 33,5mm diameter. Wide, deep cup.
Rim : 7,0  mm Flat, well-defined inner edge.
Bore : 8,1  mm
Resistance : Low – open blowing.
 
The cup of the PT-88 is wider yet not quite as deep as that of the PT-50. The sound has great strength and depth combined with huge dynamics over a wide range.  The middle and low register benefit from the cup volume.  The high register is secure yet mellow sounding.

Perantucci tuba mouthpieces are available with the following shanks:
No indication:  Large shank, for modern instruments with large receivers: (ø = 15.2 mm)
S models:   For intruments with small receivers: (ø = 14.8 mm)
Standard large European shank is recommended for most mouthpieces.
The Perantucci S shank is recommended for instruments that have smaller receivers or those which have high resistance sounding.