Looking for replacement balancers, or just the spring

A quick learner from Brockport, NY USA says:
February 4, 2020
Windows were purchased from Chase Pitkin in the Rochester, NY, USA area, about 15-18 years ago.

Thank you very much for your help!
Thumbnail of the uploaded file named window.jpg
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Casey from SWISCO responded:
February 5, 2020

Hello,

This looks like an older version of our 15-180 pivot shoe that is used with the S190 coil springs. You can also view other coil balances hardware that you may need under the related items section of our product page. Thank you!
A quick learner from Brockport, NY USA says:
February 5, 2020
Thank you so much for your help!!!!!
I have placed an order for 4 springs, order #1340279
For the future, how can I be sure to order the correct spring?
I have the ability to weigh the sash....
Or, can you go by sash size?
I just placed the order the way I did, this time, to get passed a non functioning window.
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Casey from SWISCO responded:
February 6, 2020

Well, if you ever happen to run into another coil spring dilemma and would like some assistance, you can always reach out to us. We are always happy to help. 
Coil Balance Shoe
Coil Balance Shoe
15-180
$3.97
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