replacement spiral window balance

A home owner from new jersy says:
I don't have any markings on my old window Please help to find replacement. Thank you
User submitted image of their window hardware.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. If the diameter of your outer tube is 5/8" or 9/16", then I recommend our S600-25.
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
VIDEO
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How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
GUIDE
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
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