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the outer seal is the thin embossed metal shim seal behind the backing plate
the foam seal goes behind the bearing retainer and is to keep dirt out of the wheel bearing
Do you have part numbers for these?
I don't have the numbers but don't worry about the outer seal that is in the retainer.It is more of a dust seal than a grease sea and is only replaced when the bearing is replaced as it requires the bearing being removed to replace it. The inner seal is the important one as it keeps the rear end lube out of the bearing which is lubricated by packing with a needle and good wheel bearing grease.
Clean it, if it's Dirty. Oil it, if it Squeaks.
But: Don't fix it, if it Works!
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