In "olden" days, poles might have been made out of aluminum,
which is pretty much the same material as the bar that vaulters
try to vault over.
However, nowadays vaulters use poles made of fiber-glass,
which is much lighter and more flexible.
Pole lengths may vary, but the minimum is usually (unofficially) around 12ft. and the max depends on the height you are attempting to vault over.
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