Coil spring replacement

A home owner from NH says:
June 11, 2018
for a double hung window made by kohltech. estate model
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Tom from SWISCO responded:
June 13, 2018

Hello! The window information isn't going to identify the spring balances, in your case. Can you send photos of the balances themselves, removed from the window? If we see what Kohltech used, we can recommend a replacement.
A home owner from NH says:
June 14, 2018
The window weighs 13lbs and there were two of them one on each side. Both broken. Thanjs
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Paul from SWISCO responded:
June 15, 2018

It's hard to tell what this is, because it's still hooked into the pivot shoe. I have an idea, though. Take a look at how your 1/2" wide coil spring attaches to the shoe. If the end looks like Series 160, then use S160-6 for your 13 pound sash.
A home owner from NH says:
June 16, 2018
Thank you. you both have been very helpful. the end part attached to the shoe looks like a Series 152. should I use a 6lb or a 7lb coil balance on two sides?
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Tom from SWISCO responded:
June 19, 2018

I'm glad we've been able to help! If the spring is screwed onto the shoe, use the S152-6 for your 13 lb. sash. Let us know how it works out.
6 lb Series 152 Coil Balance
6 lb Series 152 Coil Balance
S152-6
$4.80
How to Replace a Triple Coil Balance System
How to Replace a Triple Coil Balance System
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