Vincent Bach mouthpieces have been a gold standard for brass players for generations. Bach produces hundreds of mouthpiece models to suit every player. Bach created the sizing method used by many mouthpiece manufacturers worldwide. I encourage you to look at the  Bach Mouthpiece Manual to learn more.
Diefes Brass is discontinuing stocking Bach cornet mouthpieces. Our prices are discounted and once stock is sold it will not be refreshed.