The YFH-631G is easy to play in a traditional style and has a broad and rich tonal range. Proper intonation can be achieved by adjusting the third valve slide trigger.
Specs
| Model | YFH-631G | YFH-631GS |
| Key | Bb | Bb |
| Bell Material | Two piece, Gold brass | Two piece, Gold brass |
| Bell Diameter | 151.8mm (6") | 151.8mm (6") |
| Bore Size | M 11mm (0.433") | M 11mm (0.433") |
| Weight | Medium | Medium |
| Finish | Clear lacquer | Silver-plated |
| Mouthpiece | FH-11F4 | FH-11F4 |
| Case | Included | Included |