Gapco

Hello there!

Thanks for reaching out to us. I'm afraid I don't recognize this top sash guide at first glance but I'm going to have one of our senior experts take a look and see if they could recommend a replacement for you. We'll reach out as soon as more information is available. Thank you!

Your top sash guide looks like our 18-036 where the installer drilled a top screw hole. The black version is no longer made, I'm afraid. Take a look at the specifications for this part and see what you think.