Tip Color question

A quick learner from Ohio says:
May 10, 2020
Hello, I need to replace some spiral balances (35? with 5/8? diameter) but they don?t have color tips attached. Bottom window is 35?x30?. Windows were probably last replaced in 1994. I found the springs rusted and unattached to the window. My best guess is probably red tip, let me know what you think. Thanks!
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Tom from SWISCO responded:
May 12, 2020

I don't know what color tip you need from these photos. If you don't have a tip on your original balance, then the only other way to figure that out is to weigh your sash on a scale and refer to the chart on the S600-35 store page.

I highly recommend that you don't guess. I've done that before and I've been burned. It's best just to weigh the sash so you know for sure. 
35" Series 600 Spiral Tilt Window Balance
35" Series 600 Spiral Tilt Window Balance
S600-35
$10.32
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