JK 6D-1 H. Kobler Valve Trombone
Mouthpiece for Valve Trombone and Bass Trumpet

Technical Data
- Manufactured by JK
- Harald Kobler Signature model
- Medium-flat cup
- Rim diameter: 38.25 mm
- Cup diameter: 25.75 mm
- Bore: 6.2 mm
- Small shaft: 10.8 mm
- Silver-plated