Black plastic part

A landlord from New York says:
Its the black square plastic
Thumbnail of the uploaded file named Traco part.jpg
Profile picture of Bob
Bob from SWISCO responded:

Looks like you need a new Top Sash Guide. We likely can help, but we need to see an undamaged one out of the window, with photos of its front and side. From there we should be able to ID what you need.

A landlord from New York says:
Picture attached as per your request
Thumbnail of the uploaded file named Traco Part 1.jpg
Profile picture of Bob
Bob from SWISCO responded:

Thanks, that's great. Looks like our 18-173 Top Sash Guide to me. Just review the dimensions to confirm. Let me know if you have further questions. 

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