Need help identifying this Atrium window part

Question

Hi, the top corner of our Atrium brand window broke off and we found a plastic part screwed to the top broken. Please help us identifying the part so we can order a replacement. Thanks!
Best
Brittany

User submitted a photo of a top sash guide.

Paul · Accepted Answer

Hello, Brittany. Look at our 18-171 and let me know if you think this could be a good match.