Replacement window balance

A home owner from California says:
I'm looking for replacement window balances, however not sure which is the correct part. The markings I found on the ones I pulled out indicate 2130 AD BSI. The aluminum part measures 22in. Thank you.
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Bob from SWISCO responded:

See our S350-22. Look over all the dimensions and specifications to ensure this matches your old balance. You'd need a stamp option of 2130.

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