Robert Tucci Sousapower mouthpieces are for strong players that desire exceptional projection and strength in the middle and low register.  The rim design and proven cup characteristics combine to create a high level of efficiency. 

Specifications:
Cup Diameter: 32mm/1.26in, medium depth, pear shaped
Rim: Width, 8mm/0.31in, slightly rounde inner edge
Bore: 8.4mm/0.33in