| YSL-620 | YSL-640 | ||
|---|---|---|---|
| 調性 | Bb/F | Bb/F | |
| 揚聲口材質 | Yellow brass | Yellow brass | |
| 揚聲口直徑 | 214.4mm (8 1/2") | 214.4mm (8 1/2") | |
| 管徑 | L: 13.89mm (0.547") | ML: 13.34mm (0.525") | |
| 外觀 | Gold lacquer | Gold lacquer | |
| 吹嘴 | SL-48L | SL-48S | |
| 樂器盒 | Included | Included | |
| Outer Slide Material | Yellow brass | Yellow brass | |
| Inner Slide Material | Nickel silver | Nickel silver | |
