Bow for double bass.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~54900~104889/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~41931~102382/full/150,/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~54887~102380/full/150,/0/default.jpg