30" window balanced with 29B W stamped on it

A quick learner from Florida says:
October 6, 2019
I'm looking for replacement 30" window balancers as shown in the pics included
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Bob from SWISCO responded:
October 10, 2019

Thanks for writing in. See our S380-30 or S385-30 to start. The only difference between these two balances is the 'depth' of the bottom nylon shoe, so compare both with your old hardware to see what matches best. You will need a stamp option of 2920.
30" Series 380 Channel Balance
30" Series 380 Channel Balance
S380-30
$11.30
30" Series 385 Channel Balance
30" Series 385 Channel Balance
S385-30
$11.30
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