Replacement 29" channel balance 28 4 IU CMC 7
A quick learner from cudjoe key florida says:
January 13, 2012
Markings on the balance are as follows: 28 4 IU CMC 7. 29 inches total metal length. rolled edge. from a NuAir single hung window
Tom from SWISCO responded:
January 17, 2012
Thank you for posting, and for the pictures! I believe you have an S385-29, but before I can say it definitely I would like you to take a look at the graphic below. Confirm your balance has the 15-004 attachment (which looks very similar to the 15-005 attachment).