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I imagine they are the original ones seems a bit odd they wouldn't have made them handed ?
The rubbers are identical, the steel brackets are handed and you put the steel tube in the opposite hole in the rubber(but same physical positio front to back) for the screw to clamp on.I have seen in the past the same clamp used both sides and the stem on one side fitted backwards, one of those things you stand looking at, know there is something wrong but cant figure what till the light bulb goes on