That's just a rebranded Innokin VTR. I don't think that's the original tank that came with it so knowing what it is would help as far as finding coils. But as I said, a pic of the coils would help a lot. If it, too, is "TECC" brand, it's just a rebranded tank so it will likely take some Innokin, Kanger or Smok coil.