The SMOK RPM 2 Replacement Coil Pack is designed for the SMOK RPM 2 Pod Mod Kit and Smok Nord 4 Pod Kit. It come in two variations: DC MTL, and Mesh. These coils allow users to customize their devices with their preferred coil style. In turn these coils allow for Direct Lung and Mouth to Lung vaping styles. Each replacement Coil has two o-rings on the top and one o-ring on the base for a quick plug and play system.