Counter balance for sign board of approx. 25#.

A quick learner from Stoughton, WI says:
Hello, I am looking for a constant force counter balance spring or springs that will support a sign board of approx. 25#. The travel for this support needs to be 30 inches min. I could use more than one spring in my design.
thanks, Bob
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Tom from SWISCO responded:
It's hard to suggest any hardware for custom projects, but you could consider our S140-25. See if this could work for you.
A quick learner from Stoughton, WI says:
Tom, you are correct the Oct. 3rd response got deleted by mistake. Thanks for referencing your response.
What is the extended length of the S140-25. Will it accept 30 inches of travel.
tx, bob
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Paul from SWISCO responded:
The S140-25 has a travel of 32".
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