Need to order replacement

A quick learner from San Pablo says:
Single load hung balance spring replacement.
I wanted to order 2 of these. It says on my window:
series: 810
Type: single hung
Mfr: pop-28
810 06270328
User submitted photos of a window balance.
Profile picture of Tom
Tom from SWISCO responded:
Thanks for posting! Please see our Series 385 channel balance. I think this could be a good match. Let me know what you think!
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