Marking on Channel

A home owner from Naples, FL says:
March 25, 2021
Channel is 29 inches and marking says 2850 BSI
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Bob from SWISCO responded:
March 29, 2021

See either our S351-29 or S390-29. The only difference between these two balances is the depth of the bottom nylon shoe, or 'heel-to-toe' measurement, so compare both with your old hardware to see what matches best. You will need a stamp option of 2850. 
29" Series 351 Channel Balance
29" Series 351 Channel Balance
S351-29
$11.10
29" Series 390 Channel Balance
29" Series 390 Channel Balance
S390-29
$11.10
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