Axle for 87-175?

A quick learner from Thousand Oaks, CA says:
From the photo it looks as if the 78-175 Tomray Tyco 66 window roller is what I need. My question is--is the axle that the roller is mounted upon made of plastic?
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Tom from SWISCO responded:
Good morning, and thanks for contacting us! The axle is actually part of the wheel itself, and is therefore the same metal.
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