Dave Sr. from SWISCO responded:
January 19, 2018
Thanks for your patience! I can't tell what the dimensions you need are, so I'll make some suggestions on the right side of the page. Take a look at the rollers I listed. Compare the thickness of the housing (include the bumps), the height of the housing, and the diameter of the wheel. Let me know if any of these match what you need. What keeps these types of rollers in place is the screw that attaches to the top of the housing.
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