Brass.
Trombones are made of Brass.
The traditional material for the trombone is brass.
Trombones can be and have been made from various materials. However, the best metal for a trombone's sound quality seems to be brass. Alloys of nickel-brass have been used. Trombone bell sections made from sterling silver have also been made. Each variation in the material imparts a slightly different quality to the sound. Aluminum would probably be a poor choice of material. However, many mutes for trombones are made of aluminum due to the light weight of the material.
Most trombones are made of brass hence the name brass instruments.
Trombones are made from brass, an alloy of copper and zinc.
metal
brass
Brass
Trombones are made of brass.
In the bach factory
Trombones are primarily made of brass.
That song is called "76 Trombones," and it is from the musical "The Music Man."