What tip color?
A home owner from Tempe AZ says:
September 26, 2016
I've got a 3/8 in tube with no colored tip in any of my affected windows. Tube length is 29". Thanks!
Tom from SWISCO responded:
September 27, 2016
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.