Searching for 29" channel balance 298

Thanks for posting. I am confident the replacement you need is the S770-29 with a 29B Stamp.

The compatible shoes for this balance are the 15-129 and 15-178. To confirm which of these is the best fit, you'll need to remove the shoe from the window to compare the measurements.

Detail of 15-129

Looking at your window, I couldn't help but note that your tilt latch is worn. In case you may consider replacing those as well, our 26-243 and 26-244 might be suitable replacements.

Have you seen the 26-243 and 26-244 tilt latches that Jasmine recommended in her response to your original post? Take a look and compare the dimensions shown on our product pages to confirm that they match up to your part. Thanks for posting!