Paul from SWISCO responded:
May 19, 2014
Thanks for posting. This looks a lot like our 84-001 roller. Check it out and see what you think. The 84-107 has a stainless steel roller and the 84-031 has a steel ball bearing roller. Some people have said that these roll more smoothly, but it's also important to consider the environment. Nylon and stainless steel work better in areas where corrosion is a problem.
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