No markings on the parts.

A handy person from Glass patio sliding doors. says:
March 21, 2024
I noticed when I tried to remove the roller it's on a pivot point and no screws to remove from that pivot point. I removed the adjustment screw and a secondary screw from the front. I don't know the manufacturer of the doors and the house was built in 1997 in Orlando Florida. Each glass door has one roller on each corner. It looks like I have to remove the bottom frame of the doors to somehow get access to the rollers.
Thumbnail of the uploaded file named Roller
Thumbnail of the uploaded file named Wheel
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Dave Sr. from SWISCO responded:
March 25, 2024

You would need to remove your roller to determine the correct match, which very well may require removing part of the bottom frame if no installation screws are visible. If you're not comfortable taking on such a project, you may want to consider enlisting the help of a local professional. 

In the meantime, take a look at the 81-133 roller. The roller part shown in your photos is a similar style but you'll need to remove the rest to confirm if it matches the specifications below. Look over the related information and video as well. Thank you. 

Alternate image for 81-133
Alternate image for 81-133
Sliding Door Roller, Alcan
Sliding Door Roller, Alcan
81-133
$10.70
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