Clarinet. Nominal pitch: B♭.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~62500~102000/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~81204~186530/full/150,/0/default.jpg