Window Balance 28 3 IL Caldwell

A quick learner from georgia says:
The code on the balance is too light to get picture of. The stamp reads as follows: 28 3 IL Caldwell. Each balance is 2'5" without the attachments.

The reason for replacement is because the windows will not hold up. The continue to slide down when opened.

Please help me identify which parts I need for replacement.
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Hello. Take a look at our S380-29 with a 2830 option. Carefully compare your balance shoes to ours. Get back to us and let us know if this a match for you.
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