What tip color?

A home owner from Tempe AZ says:
I've got a 3/8 in tube with no colored tip in any of my affected windows. Tube length is 29". Thanks!
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Tom from SWISCO responded:
Hello! If you have no color tip to use as reference, I recommend weighing your sash on a scale. Most of our spiral balance store pages have a chart that shows you how much weight each color can support.
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