20 4 FJ CALDWELL Replacement Balances

A handy person from Healdsburg, CA says:
I need to replace these window balancers. They are stamped "20 4 FJ CALDWELL". The metal channel is 1/2" wide on the closed side, 5/8" wide on the open side, and 21" long. The show on the bottom is 1&3/32" deep.
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Lauren from SWISCO responded:

Hello, thank you for posting,

With a 1-3/32" deep bottom shoe, please review the Series 385 channel balance. You will need the S385-21 with a 2040 stamp option. Please review and let us know if you have any additional questions! 

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