These (Signature model) mouthpieces from Marcinkiewicz are made to each specific player’s specifications.
Measurements such as inner diameter, venturi, etc., are not arranged
systematically, however this line is also numbered progressively by
cup depth from deep to shallow.
Each endorsee chose a Marcinkiewicz
Designer/Signature Mouthpiece because of his belief in the product.
Each of these mouthpieces were designed for a specific player at a
specific point in time. Many play Marcinkiewicz mouthpieces exclusively.