AR Resonance Backb. 40 L Cl. Brass Bb-Trp.
Mouthpiece Backbore for Bb Trumpet

Technical Data
- Manufactured by AR Resonance
- Bore: 4.0 mm (40)
- Backbore: large-classical
- Weight : L (light = standard)
- Material: Brass
- Silver-plated
- Made in Italy
Mouthpiece Backbore for Bb Trumpet
