SWISCO - The Replacement Hardware Authority

Andersen Window Balance replacement

A handy person from Baltimore, MD says:
the number on the old balance is: C39 6#23 3-78

The patent number is 11600-3

The unit is 3" x 6.25" plus .5" flange
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Paul from SWISCO responded:
24-637. Thanks for posting. Based on your stamp, I recommend our 24-637 Andersen sash balance.
A quick learner from Baltimore says:
Thanks for your reply. Can this replacement unit be used on both the right and left sides of the window?
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Tom from SWISCO responded:
Yes, the 23-637 can be used on both the left and right side.
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