Product Overview
Wedge two part backbores consist of an upper section, which can be regular or heavy weight, and a lower shank that can be of different lengths to adjust the gap, or for improving the pitch on a C trumpet. The two part systems provided great versatility in adjusting the backbore to your specific needs.
Medium - Similar to Warburton 7 or GR #2 backbore.
THROAT -25
