- The slide: This is the long, cylindrical part of the trombone that you move in and out to change the pitch of the notes you play.
- The bell: This is the large, flared end of the trombone that projects the sound.
- The mouthpiece: This is the part of the trombone that you blow into. It is usually made of metal and has a cup-shaped end that fits over your lips.
- The tuning slide: This is a small slide on the trombone that you adjust to tune the instrument.
- The water key: This is a small key on the trombone that you open to drain water that collects inside the instrument.
- The valve casing: This is a small, cylindrical part of the trombone that houses the valves.
- The valves: These are the small, cylindrical parts of the trombone that you press down to change the pitch of the notes you play.