It is a plastic part 15/16 tall 14/16 wide at top
I'm sorry to say that I don't recognize this part. Can you describe to me its function? Would it also be possible to see a picture of it while it's installed? That would help us find a good replacement.
Sorry - the photo I sent Before was just the top of a broken piece. I am sending a pic Of both pieces together as it looks when whole. I am Also including a pic of where it fits on the window.
Best regards,
Jack
Thanks, Jack, that's a huge help. This looks like a slightly different version of our 18-171. I wasn't able to find your version, but truth be told I think our 18-171 will work well regardless. The only major difference will be that the top corners of your sash will have little gaps that our guide can't fill. They should otherwise function the same way. Would that be acceptable?