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 most Bach small shank trombone  mouthpieces except for the basic sizes - 5G and 6-1/2AL. Our prices are discounted and once stock is sold it will not be refreshed.