Here's a review of The Russian by Kebo, which is a clone of the Kayfun 3.1. The build quality of this device is shockingly good -- easily the best vaping product from China that I've used. It delivers tremendous flavor and you get 4.5ml of capacity. The Russian delivers everything the Kayfun 3.1 offers, but it's cheaper and easier to buy. Full text review here.
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