Arnold's mouthpieces are exact copies of the famous American Originals (VB), and state of the art production methods guarantee a consistently high quality. Please note that ,with ascending numbers, the cup depth gets flatter, and the cup diameter smaller.
Generally speaking, the larger the mouthpiece ,the more demanding for the player.

We have asked several  brass players to test this range of mouthpieces and they all agree that they are a good quality piece of kit and compare very well to top brands.