How does the clarinet differ from the saxophone?

The clarinet's bore is cylindrical for most of its length, about 14.6 to 14.9 mm across. It overblows at the twelfth, an octave and a fifth, while flutes and saxophones overblow at the octave, which is why it needs extra keys and linking mechanisms. Players name its registers chalumeau, throat, clarion and altissimo.