Tuba. Nominal pitch: E♭.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~36570~103106/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~31733~103109/full/,150/0/default.jpg