Need replacement parts

A quick learner from Hampton, NH says:
April 22, 2022
This came from an old 1970s VinylLine window.
Tube is 25" with red tip. I think the S600-25 look like a fit but not sure.
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Casey from SWISCO responded:
April 25, 2022

Hello,

If your spiral balance housing has a diameter of 5/8", I agree that the S600-25 would be the correct replacement. If it is more narrow at 3/8", see the S900-25. Thanks for posting! 
25" Series 600 Spiral Tilt Window Balance
25" Series 600 Spiral Tilt Window Balance
S600-25
$8.95
25" Series 900 Spiral Balance
25" Series 900 Spiral Balance
S900-25
$8.70
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How to replace a tilt window spiral balance.
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