Bach MegaTone Gold Cornet Mouthpieces
Models with no letter designation have deep cups, #10 backbores, and produce a rich, full, clear tone.
"B" Models have medium deep cups, #7 backbores, and have a full, Teutonic tone with great volume.
"C" Models have medium cups, #10 backbores, and are preferred by many players who alternate between B flat, C and D trumpets.