Bow for double bass.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~44647~104942/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~57615~102579/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~57605~102581/full/150,/0/default.jpg