Balance Box Replacement

We are trying to find the right replacement balance box for Anderson Narrow Line windows. The glass on the double hung window measures 28" x 56". We've taken out the top guard piece to reveal the original balance boxes. Unfortunately the numbers printed on these boxes are very hard to read. There is one code on the upper right corner of the box that reads: 11600-17. Another code on the lower right corner of the box is harder to read. We think it is E34 931 136 but it is hard to be sure. I don't see any balance boxes on your site with either code. Can you help us determine which boxes would be right to order?

Thanks very much!

Thanks for getting back to us. A couple more questions tho.

Apparently, my parents had ordered a set of replacement balance boxes a number of years ago. These boxes are labeled with the numbers "731D84 09 06" and "R12 827 P53". There are a number of windows in their house that need the balance boxes replaced and they aren't sure if these will work for the window I wrote you about initially. Unfortunately, these numbers don't seem to correlate with any of the numbers on your site, so we aren't sure how to tell which windows they might work for.

Re: all the other windows that need balance boxes replaced, we wonder if there is a way we can give you a list of their measurements and you can tell us which balance boxes we need to order for which windows.

Sorry for the multi-part question. I should have asked all this up front.

Thanks for your help!

I'm attaching a picture of the replacement balance box we have in hopes that you can tell us whether it is comprable to the 24-737 or the 24-837.

Thanks so much!

Hi again,

We have some other windows of different sizes that we would like to order replacement balance boxes for.

Some of the windows have balance boxes with the code:
D52 7#31-86

And some of them have the code:
BP10 12#31 6-85

Which balance boxes would you recommend we order as replacements?

Thanks so much!