PT-36 is ideal for large-bore instruments where fast response is desired. The relatively narrow rim provides remarkable flexibility and the cup has adequate depth necessary for good tone.

Description

Cup: 33 mm diameter / Deep and funnel-shaped.
Rim: Width 7.5 mm / Medium sharp inner edge. well-rounded outer edge
Bore: 8.3 mm.

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.