Bow for double bass.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~66017~101932/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~40814~104665/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~53691~104664/full/150,/0/default.jpg