Bearing material for 81-241

A professional from Alabama says:
On the 81-241, are the ball bearings also stainless steel? I will be using on a boat in a saltwater environment so this is important.
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Dave Sr. from SWISCO responded:
I believe that the bearings are also stainless steel; I don't think the manufacturer would make a stainless steel roller without stainless steel bearings. Also, make sure you use a marine-type grease on the roller. That will help prevent them from corroding.
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