Eleaf GS air coils come in a choice of resistances. Choose the 1.4ohm or 1.5ohm coils for a tighter and more restricted vape more similar to cigarettes and for Mouth-to-Lung vaping (MTL). Alternatively, use the 0.75ohm coil for a looser, airier vape, more vapour and for Direct-Lung (DL) vaping.