Andersen window sash balancer

Question

I need help identifying the correct replacement sash balancer for a double-hung Andersen window installed in 1987.  It's a double pane window with CIG-2 3-87 IGCC CBA High Performance printed in the corner of the glass.  The panes are approximately 35x29. I attached a few pics. From other posts I read you asking folks for a stamped 3 or 4 digit number.  I looked closely and didn't see a number like that.  On one side is 11600-17 and stamped U4 11L 9-87.  On the other side there is a very faint copyright number and date.  I see no numbers on either side of the stapled tab.  Thanks for your help.

Bob · Accepted Answer

For an Andersen balance with the stamp '11L', you can use our 24-11L. Note that for this particular product, the opposite-handed side of the sash will use a different balance: see the 23-11R.