Thomann proBONE 4
Bb/F medium-bore tenor trombone · intermediate · current
Medium-large-bore Bb/F tenor with F-attachment; smaller-bore proBONE.
| Type | tenor |
|---|---|
| Key | Bb/F |
| Bore class | medium |
| Bore size | .525″ |
| Valve configuration | F attachment |
| Valves | 1 |
| Rotor type | traditional rotary |
| Bell diameter | 8″ |
| Bell material | yellow brass |
| Slide | nickel silver |
| Finish | clear lacquer |
| Level | intermediate |
| Era | current |
| Price (MSRP) | $899 |
Features: 'M' yellow-brass ($899) and 'GM' gold-brass ($929) bell collapsed to base; wrap not stated.
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