The SMOK Nord Replacement Coil Pack comes in three options: Regular, Mesh and Ceramic. The 0.6Ω mesh coil is designed specifically for direct-to-lung (DL) sub ohm vaping. Its large mesh will provide a faster heating process resulting in massive vapor clouds; whereas the 1.4Ω regular coil is designed for mouth-to-lung (MTL)vaping, allowing users to enjoy a satisfying throat hit similar to the sensation that comes with the use of combustibles. Also available is the 1.4Ω ceramic coil capable of withstanding high wattage levels with ease, providing optimal taste and recommended for CBD e-liquids. Nord Replacement Coils have two o-rings on the top and one o-ring on the base for a quick plug and play system.