YFB-621 F Tubas
| YFB-621 | YFB-621S | ||
|---|---|---|---|
| คีย์ | F | F | |
| ผิว | Clear lacquer | Silver-plated | |
| ปากเป่า | BB-67B4 | BB-67B4 | |
| 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 + 1 rotary | 4 front pistons + 1 rotary | |
