fixed top window but tilt-in bottomwindow needing spiral balance springs

A quick learner from Milton, DE 19968, USA says:
October 17, 2020
window:27x34x1.5inches 15lb. replacement needed: 26x3/8 inches
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Bob from SWISCO responded:
October 20, 2020

I am confident we can help, but the best way to know what you need is to remove one of the old spiral balances and show us. We need to know the length and diameter of the outer tube (not including the colored tip), and a picture of the color tip would be useful as well. From there we'll do our best to narrow down what you need.
A quick learner from Milton, DE 19968, USA says:
October 20, 2020
in response to your request for more info.... in my original email, i stated that the length needed is 26" and the diameter three/eighth inches... i dont understand what else is needed.. SPIRAL BALANCED....
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Bob from SWISCO responded:
October 20, 2020

My deepest apologies, I missed this information in your original statement. It sounds like you need an S900-26. For a sash that weighs 15 lbs, a Red Tip option will work just fine.
26" Series 900 Spiral Balance
26" Series 900 Spiral Balance
S900-26
$8.95
How to replace a tilt window spiral balance.
How to replace a tilt window spiral balance.
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How to Identify a Replacement Spiral Balance
How to Identify a Replacement Spiral Balance
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How to choose the proper spiral balance tip color
How to choose the proper spiral balance tip color
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How to adjust a spiral balance on a tilt window
How to adjust a spiral balance on a tilt window
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