These are replacement heads for the Smok TCT. They are made of pure nickel Ni200 non-resistance wire, which works best with temperature-controlled mods. These coils are compatible with the VCT Pro.
N1 Core Coils are single-coil and N2 Core Coils are dual-coil, and both are positioned vertically within the coil head. These are 0.15Ω and 0.5Ω, respectively, and work best between 200F-600F.
TCT Replacement Coils are packaged and sold in increments of 5.