Douglas,
It looks like a press fit, with no insulating layer that I can see. I'd surmise that the fit is tight enough to exclude water, and I don't see any corrosion. Just a little soft black surface crud, which is probably dry lubricant.
I believe them to be original to the Lefiel mast, and their reputation, from what I gather, seems pretty good.
Plus, they're 30 years old and have lasted this long, so while it's sensible to think corrosion would be a problem, it obviously hasn't been.
John
Last edited by JohnV : 11-30-2009 at 01:54 PM.
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