[HAMMOND DESIGN] Mouthpiece for bass trombone [Silver plated finish] 20BXL [HAMMOND DESIGN]

Rim 10 (1.125 inches), cup inner diameter 28.6 mm, other similar rim products/Schilke 59, Bach 1-1/4 BXL: Deep, bowl-shaped cup. It has an open playing feel, but requires a lot of breath.