Weather stripping at the top of our windows

Thank you for posting. We may be able to help, but I'm afraid I cannot identify what you have based on these pictures. I will need to see a clear picture of this seal's complete profile. That is, I need to see it from the side. I know it's very brittle and falls apart easily, but please try your best to get us an undamaged sample. See our video below for more details on exactly what kind of picture we need.

Thank you! Looks like have vinyl Rollyson window sashes. I believe they used our 58-164 weather strip. The groove should be 3/16" to accept this base, so check it out and let me know. The wool pile could be our 58-127.

To remove and install the weather strip and to check the width of the groove, remove the sash and unscrew the frame screw. Then use a block of wood and hammer to carefully knock the frame slightly apart so you can slide the weather strip out.