Milgard window balances

A quick learner from Litchfield Park, AZ says:
# on larger window balance is 31 5 JX - CMC 7

# on the smaller window balance is 31 4 PG

The top and bottom are the same design in both

I need to replace the balances in 2 large AND 2 small windows
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Emily from SWISCO responded:

Hello!

We appreciate you reaching out to us. Depending on the depth of the balance's bottom fitting, you have either the S380-32 or S385-32. Measure as shown in the image below to see which Series matches up best. 

You'll also want to select the 3150 strength option for the 31 5 stamped balance and the 3140 strength option for the 31 4 stamped balance.

Let me know if you have any questions!  

Comparison of the S380 and S385 balance shoes.
Comparison of the S380 and S385 balance shoes.

A quick learner from Litchfield Park, AZ says:
Thanks for the info. Based on your reply, I've been able to determine the correct balances and have ordered them.
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Emily from SWISCO responded:

That's great news! Thank you very much for your order and please let us know if we can be of any further assistance.

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