SMOK Micro CLP2 & STC2 Replacement Coils are compatible with the Micro TFV4 Tank. As well as a rich padding of pure organic cotton, the Micro CLP2 coil head also features fused, dual Clapton coils. These thicker, double-wound coil wires have a greater surface area than regular, single-strand coil wire. More surface area means bigger clouds and better flavours for SMOK vapers