This derailleur is not from Shimano, it is a fake. I doubt Shimano licenses small manufacturers like Hycline to use the Shimano trademark on their products, so it's probably an illegal counterfeit as well. But once installed, you won't be able to distinguish it from the original. Comes in bubble wrap with no instructions. I can't tell if it's working properly because the bike still needs more tweaking. ATM seems that the shift travel is slightly longer than the distance between the sprockets in the cassette. Will update if it ever works perfectly.
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