YBB-621 BBb Tubas
| YBB-621 | YBB-621S | ||
|---|---|---|---|
| คีย์ | Bb | Bb | |
| ผิว | Clear lacquer | Silver-plated | |
| ปากเป่า | BB-67C4 | BB-67C4 | |
| กล่องใส่ | Included | Included | |
| Body | Yellow brass | Yellow brass | |
| Bell Diameter | 366mm (14 3/8") | 366mm (14 3/8") | |
| Bore Size | 17.5-18.5mm (0.689-0.728") | 17.5-18.5mm (0.689-0.728") | |
| Height | 825mm | 825mm | |
| Valves | 4 front pistons | 4 front pistons | |
