Window balance 28 4 FK Caldwell

A home owner from 22405 says:
April 26, 2016
Attached are 3 pictures of the balance. I do not see any markings other than what is on the first picture. Can you recommend a replacement? How long before I can get it?
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
April 28, 2016
This could possibly be our Series 380 channel balance. Check it out and let me know if you agree.
29" Series 380 Channel Balance
29" Series 380 Channel Balance
S380-29
$11.10
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