coil balance length

A contractor from Brattleboro, Vermont says:
October 29, 2014
Your #180 coil balance rated at 8 pounds . When uncoiled how long is the spring, I'm trying to determine how much travel the sash will have.
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Paul from SWISCO responded:
October 30, 2014
Thanks for posting! The maximum travel of the S180-8 is 36". Is that sufficient for your needs?
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