Need new spiral balances

A home owner from ohio says:
Unfortunately no name or numbers are on the parts.
The balances are for tilt windows. Current balance dimensions are as follows:
Length: 35"
Diam: 3/8"
Tip color: Unknown / missing. Second window has either greasy white or black.
Window type: Vinyl
Sash weight: 28 lbs

Any assistance would be very much appreciated! Thanks...
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Manuela from SWISCO responded:

Thank you for your inquiry. All of your information and photos point to our S900-35 spiral balance. Take a look and see if you agree. With your window sash weighing 28 pounds, our yellow tip option will work. Review the part mentioned and let us know if you have any other questions. 

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