viking window Channel Sash Balance

A landlord from OR says:
I need 12:
29DS (B.S.L) (GJ)36

31" Channel Sash Balance's
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Bob from SWISCO responded:

Thanks for posting. I am confident we can replace these balances for you, but they'll have to be custom made due to the unique strength of their spring calibration, as indicated by the stamp code. Can you show us the nylon fittings on either end of the balances? We need to see them to identify the exact type, or series, you need. Many thanks.

A landlord from OR says:
Home depot sells the balance Sash, but cannot locate the correct guides for them.
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Tom from SWISCO responded:

Thanks for the updated information. We'll email you an order link and price quote right now for 12 balances with this stamp. I just recommend triple checking to ensure that the stamp you gave us is accurate, just to be 100% sure. These cannot be returned for a refund. You can always send us a photo to verify.

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