Best Roller Assemblies for Salt Air

A quick learner from Connecticut says:
I have just bought a house on the water with large screen doors (5 feet by eight feet) some of which have a rusted roller assembly. What is the best assembly to buy - nylon wheels or steel wheels?
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Emily from SWISCO responded:

Hello there!

Steel rollers tend to be stronger, but you wouldn't want to use them if you live in a salt air environment due to corrosion. Nylon wheels don't have these issues but they are also weaker. The decision is ultimately up to you!

I hope this helps! 

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