I bought a 5 pack of these cartridges on E-bay, the listing has already been removed (for some reason) but it looked like this  https://www.ebay.com/itm/5xPack-Amigo-Itsuwa-Liberty-Glass-Cartridge-Tank-for-Thick-Oil/182407800801?hash=item2a785a27e1:m:mqRCibVcOY1QXTshpptRTzg

I noticed that my cartridge has a fill line halfway down that says 1.0 ml but it doesn't hold nearly 1.0ml of oil. I filled mine and tried it out, the air adjustment really works & the other thing I noticed is I had to turn the heat on my vape all the way down, because it was getting way too hot with the 'liberty cartridge'

I have opened the air adjustment 1/2 way and it tokes really well, even on the lowest heat setting. I notice it seems to go through vape oil at a fast rate, although the rush is pretty fantastic

Being that the actual sale info for my purchase has been removed from E-bay I am assuming there is something wrong with my cartridges, even though I can't see anything myself

These cartridges are super easy to fill, as the entire top unscrews, leaving a large area for filling. The air adjustment definitely works, so I'm guessing these are good working copies of the real thing