Basklarinet in Bes (bassleutel)
- longName: B♭ Bass Clarinet (Bass Clef)
- shortName: B♭ B. Cl.
- description: Bass Clarinet (Bass Clef)
- musicXMLid: wind.reed.clarinet.bass
- clef: not set
- transposingClef: F
- concertClef: F
- barlineSpan: 1
- aPitchRange: 37-75
- pPitchRange: 37-79
- transposeDiatonic: -1
- transposeChromatic: -2