Caldwell Non-Tilting Window Balance

A handy person from Seattle says:
February 15, 2017
I need help identifying the correct replacement window balance for two different non-tilting window balances. They are both Caldwell brand. They are identical in length and width: 24" long (excluding the plastic ends) by 9/16" wide. One is marked "23 3 LO Caldwell", the other is marked "24 4 LO Caldwell" and has a heavier and longer spring. There are no other markings that I can find.

Thank you!
Spencer
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
February 21, 2017
Based on your photos, I think our Series 385 channel balance may be worth considering. See what you think!
24" Series 385 Channel Balance
24" Series 385 Channel Balance
S385-24
$10.55
25" Series 385 Channel Balance
25" Series 385 Channel Balance
S385-25
$10.55
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