Sliding glass door rollers

A quick learner from Utah says:
It appears that you only have one roller that looks like this roller. Mine has plastic rollers and yours has steal rollers. Are steal rollers better?
Thumbnail of the uploaded file named sliding door roller 001.JPG
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Tom from SWISCO responded:

Hello! This looks similar to our 81-087 roller, which should work for you as long as the housing dimensions match up.

You also asked about whether steel rollers are better. That's a somewhat complex question, and the answer is "sorta." There are pros and cons to each. Steel wheels are certainly stronger than nylon wheels, so if your door is heavy then they would be better. However steel wheels can also be a little rougher on the track over the years. Nylon tracks are a lot kinder to the track but obviously aren't as strong and will break more quickly. It's ultimately up to you which is a bigger concern.

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