Tilt window spiral balance

A handy person from Magnolia Delaware 19962 says:
June 4, 2017
It has red plastic surrounding the spring end

No other markings
User submitted image of their window hardware.
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Tom from SWISCO responded:
June 6, 2017
Can you confirm the diameter of the outer tube? It looks like it might be on the large side, maybe 5/8" or 9/16". If so, I recommend our Series 600 spiral balance.
A quick learner from Magnolia Delaware 19962 says:
June 6, 2017
It is actually 13/32"
Profile picture of Tom
Tom from SWISCO responded:
June 7, 2017
That seems like it'd be closer to 3/8", in which case I would recommend the Series 900 spiral balance.
16" Series 900 Spiral Balance
16" Series 900 Spiral Balance
S900-16
$7.90
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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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
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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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