black window piece

A purchasing agent from Acton says:
wondering if anyone is able to ID this piece from the top and bottom of a window. It may be some type of limiter. the Tech was not really sure. Any help would be great.
Thumbnail of the uploaded file named window part.jpg
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Tom from SWISCO responded:

The piece on the left looks like a top sash guide, but I'm not certain about the piece on the right. Starting with the top sash guide, I'd like for you to show me a picture of it from the front, if possible. For the other part, can you show me what this looks like while it's installed?

A purchasing agent from Acton says:
Thank you! I would agree it is a top sash guide and I believe the second piece screws to the guide. Unfortunately the techs did not get a pic of the piece installed on the sash but I have included some more pics. Looking to order these if they are still around.
Thumbnail of the uploaded file named window part 3.jpg
Thumbnail of the uploaded file named window part 4.jpg
Thumbnail of the uploaded file named window part.jpg
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Tom from SWISCO responded:

Thanks again for waiting. Your top sash guide looks like a match for our 18-169 . I'm very confident this is what you want. The other piece looks to be a shim of some kind. I believe it's supposed to add depth to the bottom balance shoe. Unfortunately, we don't have a replacement for this part. They usually don't wear down, since they're not exposed to any direct friction. Could you reuse it?

A purchasing agent from Acton says:
I think we should be able to reuse the shims. Thank you again for the help. I will be ordering those today.
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Tom from SWISCO responded:

Great! Glad to hear it. Thank you very much for your business, it means a lot.

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