Set of mouth-blown reelpipes, Nominal pitch: B♭.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~74230~180636/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~70846~102249/full/,150/0/default.jpg