Outlet: Trombone Mouthpiece: Underpart trumpet leadpipe and a traditional stepped backbore

and a traditional stepped backbore

C - Traditional medium bowl cup

and exceptional craftsmanship

Like other Blackburn ambronze bells

167" diameter

Outlet: Trombone Mouthpiece: Underpart trumpet leadpipe and a traditional stepped backboreBuild, expand, or refine your mouthpiece setup while enjoying significant savings with our Outlet Trombone Mouthpiece Underparts. These underparts may have minor cosmetic blemishes, handling marks, engraving imperfections, plating flaws, light scratches, or other non performance related defects. Some may have been used for demonstrations, fitting sessions, photography, trade shows, testing, or customer returns. Each underpart has been carefully