1. Mouthpiece: Contains reed.
2. Ligature: Secures the reed.
3. Barrel: Connects upper joint to the mouthpiece.
4. Top Joint (upper joint): Has the first five tone holes
5. Bottom Joint (Lower Joint): Extends instrument to 7 notes
6. Bell: Extends clarinet in length
7. Key mechanism: Keys (usually in silver/nickel-silver), rods, screws hold pads that cover and uncover tone holes to enable a specific key to play.