The standard line of our tuba mouthpiece is the result of a decade of collaboration with some of the world's finest tuba players. This line offers models that suit your daily demand for orchestral, solo, and chamber playing. 
The Tubifer models are derived from the "Original Warren Deck" mouthpieces, we spent time one R&D to fulfill the demand of players who are ethusithic about the original WD models.
 
Spec References:
Ultimate Brass Tuba Mouthpiece Spec Sheet