I believe that is a quiver.
The name given for a container for arrows is called a quiver.
Archers carry a container called a quiver on their backs to keep their arrows within arm's reach.
a quiver is not a measurement it is a device used for holding arrows
Arrows
The reverse design has 5 arrows in the bundle the eagle is holding.
quiver
A quiver if you have them for use, but not drawn. A rest if it is used to hold the arrow in place during the draw.
From 1932 to 1998, yes, the eagle is holding a bundle of arrows.
liquid
it is called a container
6, They pierce the shield.