Patio door roller

A quick learner from Colorado Springs says:
Single roller, unsure of wheel diameter at this point. This is a heavy alum door and window
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Bob from SWISCO responded:

Take a look at our 81-023, 81-278, 81-279, or 81-282 to start. Compare the dimensions, particularly the height and width of the assembly and the wheel diameter, to see if one of these match what you need. Let me know what you find. 

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