AR Resonance Backbore GR0 Brass Trombone
Mouthpiece Backbore for Trombone

Technical Data
- Manufactured by AR Resonance
- Large shaft
- Bore: 7.2 mm (72)
- Backbore: narrow
- Weight : L (light = standard)
- Material: Brass
- Silver-plated
- Made in Italy
Mouthpiece Backbore for Trombone
