Spiral Balance Help

A handy person from Danvers says:
Hi, I recently purchased spiral balances from you guys and they work great. I now need some for a larger, older window. The window did not have any balances in it when I arrived on this job, I believe there were weights, but the pockets were eliminated. The sash is 43-1/2" tall and 39-1/4" wide. What length balance would be appropriate? Thank you
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Tom from SWISCO responded:

Sure, I think we can help. We believe you can use a 42" long Series 500 spiral balance, in addition to our 17-012 bottom bracket (sold separately).

The only issue is that we can only supply a balance this large as a custom order. Would that be okay? If you tell me how many you need, I can email you an order link and price quote for the requested quantity. Let me know!

How to adjust a spiral balance on a non-tilt window
How to adjust a spiral balance on a non-tilt window
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