The tenor horn is a wide-bored brass instrument with three or four valves. It is played with a beaker mouthpiece (a deep kettle mouthpiece). The main tube length of the conical brass tube is (in B-tuning) about 266 cm, about twice as long as that of the B-flugelhorn. In Austria, the tenor horn is also known as the "bass flugelhorn". The tenor horn has a conical scale length, which is narrower than that of the baritone horn (which is about the same length), which is why higher natural tones and soft tones can be produced more easily on the tenor horn. Its tone is richer in partial tones than the baritone and is thus perceived as tonally harder and sharper, but lighter and more precise, tending towards that of the French horn.