The clarinet bore is the cylindrical opening that runs through the instrument. It is responsible for the clarinet's characteristic sound and intonation. The bore size and shape vary depending on the type of clarinet. For example, the bore of a Bb clarinet is larger than the bore of an A clarinet.
Wooden or Not?
Most clarinets are made of wood, typically grenadilla or rosewood. However, some clarinets are also made of other materials, such as plastic or metal.
If you want to check whether your clarinet is wooden, you can do so by looking at the instrument's body. If it is made of wood, you will see the grain of the wood. If it is not, you will not see any grain.
Additionally, wooden clarinets are typically more expensive than plastic or metal clarinets.