"20 BSI" Balance id

A home owner from Nh says:
August 7, 2017
Double hung tilt in circa 1986 wood windows with plastic holding the balance
Do you sell these

Ron
Channel balance
Profile picture of Tom
Tom from SWISCO responded:
August 11, 2017
Hey, Ron. See our Series 751 channel balance, this looks like it could be a good match.
21" Series 751 Channel Balance
21" Series 751 Channel Balance
S751-21
$10.56
Short S-Clip
Short S-Clip
19-029
$0.65
Long S-Clip
Long S-Clip
19-030
$0.70
How to install a ribbed tilt channel balance with knife lock shoe
How to install a ribbed tilt channel balance with knife lock shoe
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Classifying Channel Balance Fittings
Classifying Channel Balance Fittings
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