Sliding window roller replacment

A professional from USA says:
We are trying to replace the attached Del Mar roller on a sliding laboratory window.
Can you suggest a replacement?
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Tom from SWISCO responded:
I would be happy to. If you can, please remove the roller from the window and show us a few pictures of it by itself. We would also need your dimensions, so please measure it and let me know what you get. You can look through our sliding window hardware section to get an idea of what kind of pictures and measurements we need.
A professional from Indianapolis, IN says:
Here are my additional photos. Thank you for your help WIDTH HOUSING 2 1/2 Height 1 1/8 inch Wheel Dia is 1 1/4
User submitted image of their window hardware.
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Tom from SWISCO responded:
Thanks! This looks similar to our 81-268. Check it out and see what you think.
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