constant force balance spring

A quick learner from Milford ct says:
I have a bath room window that needs new springs to hold it up---it weighs 10lb--it is the 190 series 1/2 in width spring-------I think it would be the 540---it has 17in of window travel-----wish you had the specs for each spring on the web page..
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Paul from SWISCO responded:
Yes, I agree. The S190-540 is what I would recommend as well, since each spring can hold up to 5 pounds.

We are gradually working through our catalog, adding more details to each balance page. We hope to have all the pertinent information soon, but we have a lot of balances and so it will take some time. We appreciate your patience!
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