The clarinet is composed of five parts: the beak-shaped mouthpiece with a single reed, the barrel (or socket), a piece of tube that bulges like a barrel, the upper joint (left-hand joint), the lower joint (right-hand joint) and the funnel-shaped bell.
- Name: Bb Clarinet
- Spelling
- German: Klarinette in B
- Italian: clarinetto in si bemolle
- French: clarinette en si bémol
- Classification: Aerophone, single-reed instrument, woodwind
- Material: Tube: Ebonite or grenadilla or metal; keywork: nickel silver, brass, silver or gold
- Mouthpiece: Beak-shaped mouthpiece made of ebonite or cocus wood with a single reed (width up to 12.5 mm, material: arundo donax)
- Tube: Mainly cylindrical, barrel-shaped bulge below the mouthpiece (barrel)
- Total length: Approx. 66 cm (clarinet in Bb), approx. 71 cm (clarinet in A)
- Bore: Medium, inner diameter approx. 12.7 mm
- Keys/tone holes: 24 tone holes; German (Oehler clarinet) or French keywork (Boehm clarinet)
- Bell: Funnel-shaped