What is this and where can I get 4 of them.

A quick learner says:
Older home 1985 single hung bottom window where can I buy these? Came off little square holes when I changed channel balences thank you
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Tom from SWISCO responded:

I'm afraid your photo is a little too unclear to make out. In order to help, I will need a clearer photo of the t in question. Seeing what it looks like while installed would also give me a better idea of what its function is and whether we have anything that matches.

A quick learner says:
It seems to help window slide up and down to stay on track
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Tom from SWISCO responded:

Thank you. This appears to be a face guide of sorts. With that in mind I think our 67-028 looks like our best match. This has the same general shape, though it still has a few differences I'm not sure about. It's worth looking over before you buy anything just to confirm they match up.

Dimensions for 67-028

A quick learner says:
Thank you so much. Swisco is the best.
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Tom from SWISCO responded:

You're very welcome! Please let me know if we can be of any further assistance.

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