1/2" channel balance identification

Home Owner from Kennesaw, GA
Need to purchase 2 pair of 1/2" channel balances for 2 non tilting windows. Channels are 29" long and have 2820 stamped on them. Windows were installed in early 80's. I believe them to be S380 but need your verification from the pictures I attached that this is correct before ordering. Thanks, Ed.
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Bob
Bob from SWISCO
SWISCO
Expert

Thanks for writing in, Ed. I agree this looks like an S380-29. Just go over all the dimensions to confirm it matches what you need. You will need a stamp option of 2820.

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