Northern Brass 3-64**** Trumpet Mouthpiece .640 inner diameter
This has the medium shallow **** cup but with the comfortable #3 rim which is similar to the GR standard rim width but has a softer bite.There is a sufficient amount of what many refer to as "undercut". A great choice for those who bottom out on the 6a4a the Shew models and similar mouthpieces. Those who like the 3-64*** often add this model to their arsenal for when a darker broader sound is desired yet still efficient enough to tackle the most difficult trumpet literature. GR#1 back bore is used.
Please see the Northern Brass Mouthpieces Description section for more info on the rims and cups.
Shipping outside of the USA contact us first before purchasing. We will invoice you separately for International shipping. We only use Guaranteed Global Express which is $99.00.