Unknown Roman scorpion parts

[Sideswipe]

What are those two cylinders for, and what are they called?

[Ad Bot]

[LeetZero]

According to Wikipedia they would enclose the springs.
https://en.wikipedia.org/wiki/Greek_and_Roman_artillery
"Most of the frame detail were made in the Hellenistic period of wood. Hero of Alexandria proposed metal frame and metal cylinders to enclose the springs. Depictions on Trajan's column and archeological evidence indicate that these metal artillery pieces were widely used by the Romans."

[Ravencroft·]

That's where the elastic would normally go, so that's most likely some sort of protective casing covering it.

[Sideswipe]

Thanks guys.