SMOK Nord Replacement Coil.
The Nord Coil rated at 1.4 ohm, uses a Kanthal coil, and is recommended for "Direct to Lung" vaping.
The Nord Coil rated at 0.6ohm, uses a kanthal coil, and is recommended for "Mouth to Lung" vaping.
Nord Replacement Coils have two o-rings on the top and one o-ring on the base for a quick plug and play system.