Window balance replacement

A quick learner from Virginia says:
This balance is marked 34b and measures 34 inches. The foot has pat # 4610108. The top clip doesn't have any markings

Except for the top clip, it looks like a s795.

I believe this was part of an atrium window.
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Tom from SWISCO responded:

I agree, this looks like our S795-34 but with the top screw tab swapped out for our 15-198 hook. We can supply a balance according to these specifications, but it would have to be a custom order.

Before we go any further, can you just tell me how many you need? Once I know that, I can email you an order link and price quote for that quantity.

A quick learner from Virginia says:
I would need 2 of these assuming they can be replaced one at a time. I have 2 windows with one balance non-functional each.
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Tom from SWISCO responded:

We usually recommend that you don't mix old and new balances, but it's ultimately up to you. I will email you two order links: one for 2, and another for 4 in case you want to replace these in pairs. Let me know if you had any questions!

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