window will not stay up

A handy person from 16801 says:
could you help me identify the right replacement springs
are these called: Coil Balance, Constant Force ?
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Casey from SWISCO responded:


I can't say for sure with your hardware still in the window but I suspect you might be using our 15-087 housing pivot, which uses the S180 coil springs. Take a look and compare the specifications of these parts, as well as the related items on both product pages, to your hardware once it's removed from the window. We'll relate a few videos to assist you. Thanks for posting! 

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