These mouthpieces 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.
ET1 is a large shank mouthpiece. All other Marcinkiewicz Signature Trombone models are small shank mouthpieces.

The following Marcinkiewicz flugelhorn models are included in our trial policy:

All other Marcinkiewicz cornet models are special orders and are non-cancelable and non-returnable.