replacement part needed for double hung window

It's tough to make out the full design of your shoe while it's still installed but the design looks like an older version of our 15-177. The 15-177 has some mild design differences but it's designed to work in all the same applications.

For now, look this part over and see what you think. If you aren't sure, remove the old shoe from the window entirely and show it to me without obstruction.

You're welcome! Please don't hesitate to reach out if we can be of any further assistance.