29-Inch Balance Replacement
It doesn't look like the homeowner followed up on that original post, so I am curious if the recommendation given to him worked out.
Thanks for posting. We never heard back from that customer, so I can't tell you how he made out; however, I can say this is very likely an S380-29 Channel Balance. To confirm however, you'll need to measure the 'depth' of the bottom nylon shoe, or its measurement from heel to toe. The diagram below illustrates what I am talking about. If the depth is 1", then the Series 380 is indeed what you need; but let me know if it is less or greater than this in any way. For a stamp option, choose 2830.
-Andrew
PS-My father is also in the same boat so I'll help him determine how to remove the window sash then remove the window balance. I'll direct him to you folks so he can get the right product.
That's great news! Thanks so much for the business. Please feel free to reach out if we can be of any further assistance, of course. We'll always be here to help.